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When this shows up on the exam
House, HVAC House and Small Buildings all test the energy efficiency rules for Part 9 houses. Part 12 sends a year-round Part 9 residential building to SB-12 (or to a 15% better-than-old-code design) under OBC Div. B 12.2.1.2.(3)OBC Div. B 12.2.1.2. Energy Efficiency Design(1) Reserved. (2) Except as provided in Sentence (3) and Sentence (4), the energy efficiency of all buildings shall (a) be designed to exceed by not less than 13% the energy efficiency levels required by Sentence 12.2.1.1.(2) of O. Reg. 332/12 (Building Code) as it read on December 31, 2024, or (b) conform to Division…. SB-12 then offers three routes: prescriptive compliance packages, performance compliance, or other acceptable methods (SB-12 1.1.1.3.OBC SB-12 1.1.1.3. Compliance Options(1) The energy efficiency of a building or part of a building of residential occupancy that is within the scope of Part 9 of Division B of the Building Code and is intended for occupancy on a continuing basis during the winter months shall comply with (a) Subsection 3.1.1. (Prescriptive Compliance Packages) of Chapter…).
The calculation questions almost always follow the prescriptive route. They hand you a town, a furnace and some areas, then ask for one required value: a window U-value, a wall RSI, a furnace AFUE or an HRV efficiency. The traps are the wrong zone, the wrong table, the wrong column, and a glazing ratio worked out on the wrong wall area.
The method
- Find the heating degree-days. Look up the town in SB-1 Table 2, column "Degree Days Below 18°C" (SB-1 Table 2OBC SB-1 Table 2: Climatic Design DataTable 2: Climatic Design Data Location | Elevation, m | Design Temperature — January — 2.5%, °C | Design Temperature — January — 1%, °C | Design Temperature — July 2.5% — Dry, °C | Design Temperature — July 2.5% — Wet, °C | Degree Days Below 18°C | 15 Min Rain, mm | One Day Rain, 1/50, mm | Annual Rain, mm | Moisture…).
- Pick the zone. Under 5000 degree-days is Zone 1 (Article 3.1.1.2.). 5000 or more is Zone 2 (Article 3.1.1.3.) (SB-12 3.1.1.1.(1)OBC SB-12 3.1.1.1. Energy Efficiency(1) Except as provided in Articles 3.1.1.4. to 3.1.1.11., the building shall conform to (a) Article 3.1.1.2. if the building is located in Zone 1 with less than 5000 heating degree days, or (b) Article 3.1.1.3. if the building is located in Zone 2 with 5000 or more heating degree days. (2) Except as required in…).
- Pick the table by heating source. Table A is for space heating equipment with AFUE of 92% or more. Table B is for 84% up to but not including 92%. Table C is for electric space heating (SB-12 3.1.1.2.OBC SB-12 3.1.1.2. Energy Efficiency for Buildings Located in Zone 1(1) Except as provided in Sentences (2) to (5) and (7), the minimum thermal performance of building envelope assemblies and equipment shall conform to Table 3.1.1.2.A. (2) Except for solid fuel-burning space heating equipment and except as provided in Sentence (5), where the space heating equipment efficiency is 84%…, SB-12 3.1.1.3.OBC SB-12 3.1.1.3. Energy Efficiency for Buildings Located in Zone 2(1) Except as provided in Sentences (2) to (5) and (7), the minimum thermal performance of building envelope assemblies and equipment shall conform to Table 3.1.1.3.A. (2) Except for solid fuel-burning space heating equipment and except as provided in Sentence (5), where the space heating equipment efficiency is 84%…). The ".2" tables are Zone 1, the ".3" tables are Zone 2. A furnace below 84% cannot use a package at all; go to performance compliance.
- Pick one package column and stay in it. Components from different packages cannot be mixed (SB-12 Appendix A-3.1.1.OBC SB-12 A-3.1.1. Compliance Packages.Individual components of compliance packages found in Tables 3.1.1.2.A to 3.1.1.2.C and Tables 3.1.1.3.A to 3.1.1.3.C are not permitted to be mixed with similar components of other compliance packages either found within the same Table or similar components of compliance packages found in other Tables.). Check that the equipment you have meets the package's AFUE, HRV SRE and water heater EF.
- Work out the fenestration to wall ratio. Gross glazing area (rough openings of windows, sidelights, skylights, door glazing and sliding doors) divided by the gross peripheral wall area from grade to the top of the uppermost ceiling. Do not subtract the windows from the wall area. Include rim boards and any wall shared with an attached garage or another unit (SB-12 Appendix A-3.1.1.1.(7)OBC SB-12 A-3.1.1.1.(7), (8) and (9) Fenestration to Wall Ratio.When the fenestration to wall ratio is calculated, all fenestration areas and the entire peripheral wall above grade is included. The peripheral wall area includes floor rim board areas and all above grade wall areas. It is essentially the sum of the above grade walls that separate conditioned spaces from…).
- Apply the ratio rule (SB-12 3.1.1.1.(7) to (9)OBC SB-12 3.1.1.1. Energy Efficiency(1) Except as provided in Articles 3.1.1.4. to 3.1.1.11., the building shall conform to (a) Article 3.1.1.2. if the building is located in Zone 1 with less than 5000 heating degree days, or (b) Article 3.1.1.3. if the building is located in Zone 2 with 5000 or more heating degree days. (2) Except as required in…):
- 17% or less: use the package as written.
- Over 17%, up to 22%: use the package, but upgrade the window U-value one step (1.8 to 1.6, 1.6 to 1.4, 1.4 to 1.2, 1.2 to 1.0).
- Over 22%: prescriptive packages are out; use Subsection 3.1.2 (performance).
- Read the component value. Each opaque component has three rows: minimum nominal RSI, maximum U, minimum effective RSI. Meeting any one of the three is enough (SB-12 3.1.1.1.(13)OBC SB-12 3.1.1.1. Energy Efficiency(1) Except as provided in Articles 3.1.1.4. to 3.1.1.11., the building shall conform to (a) Article 3.1.1.2. if the building is located in Zone 1 with less than 5000 heating degree days, or (b) Article 3.1.1.3. if the building is located in Zone 2 with 5000 or more heating degree days. (2) Except as required in…). Windows have a U-value row and an energy rating (ER) row; again, one is enough.
- Effective RSI by layers. Add the layer values from the inside air film to the outside air film (ceilings stop at the vented attic air space; basement walls and slabs include the interior air film only). U = 1 / effective RSI (SB-12 Appendix: Effective RSI Value and U-Value CalculationsOBC SB-12 Effective RSI Value and U-Value CalculationsEffective RSI values and U values are to be calculated in accordance with good practice. Some sample effective R value calculations are provided below. Overall thermal transmittance (U values) can be calculated by taking the inverse of the effective R value (U=1/(effective RSI value)) Information on the calculation of…).
- Apply credits and penalties. Airtightness credits allow one substitution (Table 3.1.1.4.B) or two (Table 3.1.1.4.C) if the tested unit meets Table 3.1.1.4.A (SB-12 3.1.1.4.OBC SB-12 3.1.1.4. Airtightness(1) Where a dwelling unit is designed and constructed to be sufficiently airtight such that the air leakage of the whole dwelling unit is less than or equal to one of the applicable airtightness targets specified in the same row of Table 3.1.1.4.A, the requirements of Tables 3.1.1.2.A to 3.1.1.2.C, Tables 3.1.1.3.A to…). Steel framing without a thermal break needs 20% more insulation (SB-12 3.1.1.5.OBC SB-12 3.1.1.5. Elements Acting as a Thermal Bridge(1) Except for a foundation wall, the insulated portion of a wall that incorporates wood stud framing elements that have a thermal resistance of less than RSI 0.90 shall be insulated to restrict heat flow through the studs by a material providing a thermal resistance at least equal to 25% of the thermal resistance…).
A note on units: RSI x 5.678 gives the approximate R-value (RSI 3.87 x 5.678 = 21.97, about R22). That factor is a unit conversion, not a code value. SB-12 also prints its own IP tables, so quote those R-values when you need them.
Worked example 1: glazing ratio and window U-value
A two-storey house in Peterborough has a 13.0 m x 8.0 m rectangular footprint. The height from grade to the top of the uppermost ceiling is 5.4 m. Window, door glazing and skylight rough openings total 40.0 m². The furnace is 95% AFUE, and the builder picks package A5.
| Step | Work | Result |
|---|---|---|
| Degree-days | SB-1 Table 2, Peterborough row | 4400 |
| Zone | 4400 is under 5000 | Zone 1 |
| Table | 95% AFUE is 92% or more | Table 3.1.1.2.A |
| Package A5 window U | "Windows and Sliding Glass Doors", Maximum U row | 1.6 |
| Gross wall area | 2 x (13.0 + 8.0) x 5.4 | 226.8 m² |
| Ratio | 40.0 / 226.8 | 17.6% |
| Upgrade | over 17%, not over 22% | 1.6 becomes 1.4 |
The windows need a U-value of 1.4 or less (SB-12 3.1.1.1.(8)OBC SB-12 3.1.1.1. Energy Efficiency(1) Except as provided in Articles 3.1.1.4. to 3.1.1.11., the building shall conform to (a) Article 3.1.1.2. if the building is located in Zone 1 with less than 5000 heating degree days, or (b) Article 3.1.1.3. if the building is located in Zone 2 with 5000 or more heating degree days. (2) Except as required in…). Package A5 also needs a 94% AFUE furnace, so the 95% unit qualifies (SB-12 Table 3.1.1.2.AOBC SB-12 Table 3.1.1.2.A. (SI) — Zone 1 — Compliance Packages for Space Heating Equipment with AFUE ≥ 92%Table 3.1.1.2.A. (SI) — Zone 1 — Compliance Packages for Space Heating Equipment with AFUE ≥ 92% Forming Part of Sentence 3.1.1.2.(1) Component | Thermal Values[8] | Compliance Package A1 | Compliance Package A2 | Compliance Package A3 | Compliance Package A4 | Compliance Package A5 | Compliance Package A6 Ceiling…). If you had subtracted the windows from the wall area, you would get 40.0 / 186.8 = 21.4%. Same band here by luck; with more glass it would wrongly cross 22%.
Worked example 2: effective RSI of an above-grade wall
A house in Sudbury (5180 degree-days, Zone 2) has an 88% AFUE furnace, so it uses Table 3.1.1.3.B, and the builder picks package B3. The wall is 38 mm x 140 mm studs at 406 mm on centre with RSI 3.87 batts, RSI 1.76 continuous foam sheathing, vinyl siding and 12.7 mm gypsum board. The SB-12 Appendix A wall example uses an effective value of 2.55 for this framed stud layer; the other layer values below follow that example, with the foam counted at its own RSI.
| Layer | Effective RSI |
|---|---|
| Exterior air film | 0.03 |
| Vinyl siding | 0.11 |
| RSI 1.76 foam sheathing | 1.76 |
| Studs with RSI 3.87 cavity fill | 2.55 |
| Gypsum board | 0.08 |
| Interior air film | 0.12 |
| Total | 4.65 |
U = 1 / 4.65 = 0.215. Package B3 asks for a minimum effective RSI of 4.65 (maximum U of 0.215), so the wall complies (SB-12 Table 3.1.1.3.BOBC SB-12 Table 3.1.1.3.B. (SI) — Zone 2 — Compliance Packages for Space Heating Equipment with 84% ≤ AFUE < 92%Table 3.1.1.3.B. (SI) — Zone 2 — Compliance Packages for Space Heating Equipment with 84% ≤ AFUE < 92% Forming Part of Sentence 3.1.1.3.(2) Component | Thermal Values[8] | Compliance Package B1 | Compliance Package B2 | Compliance Package B3 | Compliance Package B4 | Compliance Package B5 | Compliance Package B6…). Package B3 also needs at least 87% AFUE, so the 88% furnace qualifies. Do not use the nominal 3.87 for the stud layer. Studs conduct heat, and that is the whole point of the effective value.
Worked example 3: airtightness substitution
A detached house in Timmins (5940 degree-days, Zone 2) uses a 96% furnace, so it uses Table 3.1.1.3.A. Package A5 asks for above-grade walls of RSI 3.34 + 1.76 ci. The blower door test gives 2.4 ACH at 50 Pa.
- Table 3.1.1.4.A, Detached row: target 2.5 ACH at 50 Pa. 2.4 is not more than 2.5, so credit is available (SB-12 Table 3.1.1.4.AOBC SB-12 Table 3.1.1.4.A. Airtightness TargetsTable 3.1.1.4.A. — Airtightness Targets Forming Part of Sentence 3.1.1.4.(1) and Subsection 3.1.2. Building Type | ACH @ 50 Pa | NLA @ 10 Pa, cm²/m² | NLA @ 10 Pa, in²/100 ft² | NLR @ 50 Pa, L/s/m² | NLR @ 50 Pa, cfm/ft² Detached | 2.5 | 1.26 | 1.81 | 0.93 | 0.18 Attached | 3.0 | 2.12 | 3.06 | 1.32 | 0.26 Column 1 | 2…).
- Try Table 3.1.1.4.B (one substitution) first. Its wall rows all start from RSI 3.87 or 4.22 in the cavity, so none matches 3.34 + 1.76 ci. Table 3.1.1.4.C has a row for "Above grade continuous wall insulation": 1.76 ci may drop to 1.32 ci.
- The wall may be RSI 3.34 + 1.32 ci, and one more Table C substitution is still available (SB-12 Table 3.1.1.4.COBC SB-12 Table 3.1.1.4.C. (SI) — Permitted Substitutions for Airtight Dwelling Units(3) Maximum Two Substitutions per Dwelling Unit [2]Table 3.1.1.4.C. (SI) — Permitted Substitutions for Airtight Dwelling Units(3) Maximum Two Substitutions per Dwelling Unit [2] Forming Part of Sentences 3.1.1.4.(1) and (3) Required Compliance | Permitted Substitutions — Airtightness Complies with Table 3.1.1.4.A.[1] Above grade continuous wall insulation RSI 1.32 ci…). You cannot use both tables on the same house.
Common mistakes
- Using net wall area (wall minus windows) in the glazing ratio. Always use gross wall area.
- Leaving out the wall shared with an attached garage, or with an attached unit.
- Reading the wrong zone. Pembroke (4980) is Zone 1, North Bay (5150) is Zone 2. Check the number, not the map.
- Picking Table A for a 90% furnace, or Table B for an electric house.
- Reading a value from the column next to your package, or mixing values from two packages.
- Forgetting the one-step window upgrade between 17% and 22%, or upgrading two steps.
- Adding nominal batt RSI instead of the framed effective value, leaving out air films, or counting roof sheathing above a vented attic.
- Comparing an effective RSI against the nominal row of the table.
- Using the detached airtightness target for a townhouse, or making more substitutions than allowed.
- Treating RSI x 5.678 as a code requirement.
Find it fast in the code PDF
- Supplementary Standard SB-12 > Chapter 3 > Subsection 3.1.1. Ctrl+F: "heating degree days", "peripheral walls", "Compliance Package A1", "Airtightness Targets", "Reduce furnace efficiency by 4% AFUE".
- SB-12 Appendix A notes. Ctrl+F: "fenestration to wall ratio is calculated", "Effective RSI values and U values are to be calculated".
- Supplementary Standard SB-1 > Table 2: Climatic Design Data. Ctrl+F: the town name, then read "Degree Days Below 18°C".
- Division B > Part 12 > Section 12.2. Ctrl+F: "Energy Efficiency for Housing".
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Code cited in this method
Based on the official 2024 Building Code Compendium on ontario.ca.
© King's Printer for Ontario, 2024. Reproduced with permission.
OBC Div. B 12.2.1.2. Energy Efficiency Design
Open OBC Div. B 12.2.1.2. in the code viewer(1)Reserved.
(2)Except as provided in Sentence (3) and Sentence (4), the energy efficiency of all buildings shall
(a)be designed to exceed by not less than 13% the energy efficiency levels required by Sentence 12.2.1.1.(2) of O. Reg. 332/12 (Building Code) as it read on December 31, 2024, or
(b)conform to Division 1 and Division 3 or 5 of MMA Supplementary Standard SB-10, “Energy Efficiency Requirements.”
(3)Except as provided in Sentence (4), the energy efficiency of a building or part of a building of residential occupancy that is within the scope of Part 9 and is intended for occupancy on a continuing basis during the winter months shall
(a)be designed to exceed by not less than 15% the energy efficiency levels required by Sentence 12.2.1.1.(3) of O. Reg. 332/12 (Building Code) as it read on December 31, 2024, or
(b)conform to Chapters 1 and 3 of MMA Supplementary Standard SB-12, “Energy Efficiency for Housing.”
(4)This Article does not apply to
(a)a farm building,
(b)a building that does not use electrical power or fossil fuel, or
(c)a seasonal recreational building described in Section 9.37. or 9.39.
OBC SB-12 1.1.1.3. Compliance Options
Open OBC SB-12 1.1.1.3. in the code viewer(1)The energy efficiency of a building or part of a building of residential occupancy that is within the scope of Part 9 of Division B of the Building Code and is intended for occupancy on a continuing basis during the winter months shall comply with
(a)Subsection 3.1.1. (Prescriptive Compliance Packages) of Chapter 3,
(b)Subsection 3.1.2. (Performance Compliance) of Chapter 3, or
(c)Subsection 3.1.3. (Other Acceptable Compliance Methods) of Chapter 3.
(2)Factory-built modular homes manufactured before January 1, 2017 in accordance with the Building Code as it read on December 31, 2016 shall be deemed to be in compliance with Sentence (1).
OBC SB-1 Table 2: Climatic Design Data
Open OBC SB-1 in the code viewerTable 2: Climatic Design Data
Location | Elevation, m | Design Temperature — January — 2.5%, °C | Design Temperature — January — 1%, °C | Design Temperature — July 2.5% — Dry, °C | Design Temperature — July 2.5% — Wet, °C | Degree Days Below 18°C | 15 Min Rain, mm | One Day Rain, 1/50, mm | Annual Rain, mm | Moisture Index | Annual Total Precipitation, mm | Driving Rain Wind Pressures, Pa, 1/5 | Snow Load, kPa, 1/50 — Ss | Snow Load, kPa, 1/50 — Sr | Hourly Wind Pressures, kPa — 1/10 | Hourly Wind Pressures, kPa — 1/50
Ailsa Craig | 230 | -17 | -19 | 30 | 23 | 3840 | 25 | 103 | 800 | 0.9 | 950 | 180 | 2.2 | 0.4 | 0.37 | 0.48
Ajax | 95 | -20 | -22 | 30 | 23 | 3820 | 23 | 92 | 760 | 0.9 | 825 | 160 | 1.0 | 0.4 | 0.37 | 0.48
Alexandria | 80 | -24 | -26 | 30 | 23 | 4600 | 25 | 103 | 800 | 0.9 | 975 | 160 | 2.4 | 0.4 | 0.31 | 0.4
Alliston | 220 | -23 | -25 | 29 | 23 | 4200 | 28 | 113 | 690 | 0.8 | 875 | 120 | 2.0 | 0.4 | 0.28 | 0.36
Almonte | 120 | -26 | -28 | 30 | 23 | 4620 | 25 | 97 | 730 | 0.8 | 800 | 140 | 2.5 | 0.4 | 0.32 | 0.41
Armstrong | 340 | -37 | -40 | 28 | 21 | 6500 | 23 | 97 | 525 | 0.8 | 725 | 100 | 2.7 | 0.4 | 0.22 | 0.3
Arnprior | 85 | -27 | -29 | 30 | 23 | 4680 | 23 | 86 | 630 | 0.8 | 775 | 140 | 2.5 | 0.4 | 0.29 | 0.37
Atikokan | 400 | -33 | -35 | 29 | 22 | 5750 | 25 | 103 | 570 | 0.8 | 760 | 100 | 2.4 | 0.3 | 0.22 | 0.3
Attawapiskat | 10 | -37 | -39 | 28 | 21 | 7100 | 18 | 81 | 450 | 0.8 | 650 | 160 | 2.8 | 0.3 | 0.3 | 0.41
Aurora | 270 | -21 | -23 | 30 | 23 | 4210 | 28 | 108 | 700 | 0.8 | 800 | 140 | 2.0 | 0.4 | 0.34 | 0.44
Bancroft | 365 | -28 | -31 | 29 | 23 | 4740 | 25 | 92 | 720 | 0.9 | 900 | 100 | 3.1 | 0.4 | 0.25 | 0.32
Barrie | 245 | -24 | -26 | 29 | 23 | 4380 | 28 | 97 | 700 | 0.8 | 900 | 120 | 2.5 | 0.4 | 0.28 | 0.36
Barriefield | 100 | -22 | -24 | 28 | 23 | 3990 | 23 | 108 | 780 | 1.0 | 950 | 160 | 2.1 | 0.4 | 0.37 | 0.47
Beaverton | 240 | -24 | -26 | 30 | 23 | 4300 | 25 | 108 | 720 | 0.9 | 950 | 120 | 2.2 | 0.4 | 0.28 | 0.36
Belleville | 90 | -22 | -24 | 29 | 23 | 3910 | 23 | 97 | 760 | 0.9 | 850 | 180 | 1.7 | 0.4 | 0.34 | 0.43
Belmont | 260 | -17 | -19 | 30 | 24 | 3840 | 25 | 97 | 850 | 1.0 | 950 | 180 | 1.7 | 0.4 | 0.37 | 0.47
Big Trout Lake (Kitchenuhmaykoosib) | 215 | -38 | -40 | 26 | 20 | 7450 | 18 | 92 | 400 | 0.75 | 600 | 150 | 3.2 | 0.2 | 0.31 | 0.42
Borden (CBF) | 225 | -23 | -25 | 29 | 23 | 4300 | 28 | 103 | 690 | 0.82 | 875 | 120 | 2.2 | 0.4 | 0.28 | 0.36
Bracebridge | 310 | -26 | -28 | 29 | 23 | 4800 | 25 | 103 | 830 | 1.0 | 1050 | 120 | 3.1 | 0.4 | 0.27 | 0.35
Bradford | 240 | -23 | -25 | 30 | 23 | 4280 | 28 | 108 | 680 | 0.8 | 800 | 120 | 2.1 | 0.4 | 0.28 | 0.36
Brampton | 215 | -19 | -21 | 30 | 23 | 4100 | 28 | 119 | 720 | 0.8 | 820 | 140 | 1.3 | 0.4 | 0.34 | 0.44
Brantford | 205 | -18 | -20 | 30 | 23 | 3900 | 23 | 103 | 780 | 0.9 | 850 | 160 | 1.3 | 0.4 | 0.33 | 0.42
Brighton | 95 | -21 | -23 | 29 | 23 | 4000 | 23 | 94 | 760 | 0.9 | 850 | 160 | 1.6 | 0.4 | 0.37 | 0.48
Brockville | 85 | -23 | -25 | 29 | 23 | 4060 | 25 | 103 | 770 | 0.9 | 975 | 180 | 2.2 | 0.4 | 0.34 | 0.44
Burk's Falls | 305 | -26 | -28 | 29 | 22 | 5020 | 25 | 97 | 810 | 0.9 | 1010 | 120 | 2.7 | 0.4 | 0.27 | 0.35
Burlington | 80 | -17 | -19 | 31 | 23 | 3740 | 23 | 103 | 770 | 0.9 | 850 | 160 | 1.1 | 0.4 | 0.36 | 0.46
Caledon | 425 | -21 | -23 | 30 | 23 | 4450 | 28 | 119 | 730 | 0.84 | 875 | 140 | 2.2 | 0.4 | 0.31 | 0.4
Cambridge | 295 | -18 | -20 | 29 | 23 | 4100 | 25 | 113 | 800 | 0.9 | 890 | 160 | 1.6 | 0.4 | 0.28 | 0.36
Campbellford | 150 | -23 | -26 | 30 | 23 | 4280 | 25 | 97 | 730 | 0.9 | 850 | 160 | 1.7 | 0.4 | 0.32 | 0.41
Cannington | 255 | -24 | -26 | 30 | 23 | 4310 | 25 | 108 | 740 | 0.9 | 950 | 120 | 2.2 | 0.4 | 0.28 | 0.36
Carleton Place | 135 | -25 | -27 | 30 | 23 | 4600 | 25 | 97 | 730 | 0.8 | 850 | 160 | 2.5 | 0.4 | 0.32 | 0.41
Cavan | 200 | -23 | -25 | 30 | 23 | 4400 | 25 | 97 | 740 | 0.9 | 850 | 140 | 2.0 | 0.4 | 0.34 | 0.44
Centralia | 260 | -17 | -19 | 30 | 23 | 3800 | 25 | 103 | 820 | 1.0 | 1000 | 180 | 2.3 | 0.4 | 0.37 | 0.48
Chapleau | 425 | -35 | -38 | 27 | 21 | 5900 | 20 | 97 | 530 | 0.7 | 850 | 80 | 3.6 | 0.4 | 0.23 | 0.3
Chatham | 180 | -16 | -18 | 31 | 24 | 3470 | 28 | 103 | 800 | 0.9 | 850 | 180 | 1.0 | 0.4 | 0.34 | 0.43
Chesley | 275 | -19 | -21 | 29 | 22 | 4320 | 28 | 103 | 810 | 0.9 | 1125 | 140 | 2.8 | 0.4 | 0.35 | 0.45
Clinton | 280 | -17 | -19 | 29 | 23 | 4150 | 25 | 103 | 810 | 0.9 | 1000 | 160 | 2.6 | 0.4 | 0.36 | 0.46
Coboconk | 270 | -25 | -27 | 30 | 23 | 4500 | 25 | 108 | 740 | 0.9 | 950 | 120 | 2.5 | 0.4 | 0.27 | 0.35
Cobourg | 90 | -21 | -23 | 29 | 23 | 3980 | 23 | 94 | 760 | 0.9 | 825 | 160 | 1.2 | 0.4 | 0.38 | 0.49
Cochrane | 245 | -34 | -36 | 29 | 21 | 6200 | 20 | 92 | 575 | 0.8 | 875 | 80 | 2.8 | 0.3 | 0.27 | 0.35
Colborne | 105 | -21 | -23 | 29 | 23 | 3980 | 23 | 94 | 760 | 0.9 | 850 | 160 | 1.6 | 0.4 | 0.38 | 0.49
Collingwood | 190 | -21 | -23 | 29 | 23 | 4180 | 28 | 97 | 720 | 0.9 | 950 | 160 | 2.7 | 0.4 | 0.3 | 0.39
Cornwall | 35 | -23 | -25 | 30 | 23 | 4250 | 25 | 103 | 780 | 0.9 | 960 | 180 | 2.2 | 0.4 | 0.32 | 0.41
Corunna | 185 | -16 | -18 | 31 | 24 | 3600 | 25 | 100 | 760 | 0.9 | 800 | 180 | 1.0 | 0.4 | 0.37 | 0.47
Deep River | 145 | -29 | -32 | 30 | 22 | 4900 | 23 | 92 | 650 | 0.8 | 850 | 100 | 2.5 | 0.4 | 0.27 | 0.35
Deseronto | 85 | -22 | -24 | 29 | 23 | 4070 | 23 | 92 | 760 | 0.9 | 900 | 160 | 1.9 | 0.4 | 0.34 | 0.43
Dorchester | 260 | -18 | -20 | 30 | 24 | 3900 | 28 | 103 | 850 | 1.0 | 950 | 180 | 1.9 | 0.4 | 0.37 | 0.47
Dorion | 200 | -33 | -35 | 28 | 21 | 5950 | 20 | 103 | 550 | 0.8 | 725 | 160 | 2.8 | 0.4 | 0.29 | 0.39
Dresden | 185 | -16 | -18 | 31 | 24 | 3750 | 28 | 97 | 760 | 0.8 | 820 | 180 | 1.0 | 0.4 | 0.34 | 0.43
Dryden | 370 | -34 | -36 | 28 | 22 | 5850 | 25 | 97 | 550 | 0.7 | 700 | 120 | 2.4 | 0.3 | 0.22 | 0.3
Dundalk | 525 | -22 | -24 | 29 | 22 | 4700 | 28 | 108 | 750 | 0.9 | 1080 | 150 | 3.2 | 0.4 | 0.33 | 0.42
Dunnville | 175 | -15 | -17 | 30 | 24 | 3660 | 23 | 108 | 830 | 1.0 | 950 | 160 | 2.0 | 0.4 | 0.36 | 0.46
Durham | 340 | -20 | -22 | 29 | 22 | 4340 | 28 | 103 | 815 | 0.9 | 1025 | 140 | 2.8 | 0.4 | 0.34 | 0.44
Dutton | 225 | -16 | -18 | 31 | 24 | 3700 | 28 | 92 | 850 | 1.0 | 925 | 180 | 1.3 | 0.4 | 0.37 | 0.47
Earlton | 245 | -33 | -36 | 29 | 22 | 5730 | 23 | 92 | 560 | 0.8 | 820 | 120 | 3.1 | 0.4 | 0.35 | 0.45
Edison | 365 | -34 | -36 | 28 | 22 | 5740 | 25 | 108 | 510 | 0.7 | 680 | 120 | 2.4 | 0.3 | 0.23 | 0.31
Elliot Lake | 380 | -26 | -28 | 29 | 21 | 4950 | 23 | 108 | 630 | 0.8 | 950 | 160 | 2.9 | 0.4 | 0.3 | 0.38
Elmvale | 220 | -24 | -26 | 29 | 23 | 4200 | 28 | 97 | 720 | 0.9 | 950 | 140 | 2.6 | 0.4 | 0.28 | 0.36
Embro | 310 | -19 | -21 | 30 | 23 | 3950 | 28 | 113 | 830 | 0.9 | 950 | 160 | 2.0 | 0.4 | 0.37 | 0.48
Englehart | 205 | -33 | -36 | 29 | 22 | 5800 | 23 | 92 | 600 | 0.8 | 880 | 100 | 2.8 | 0.4 | 0.32 | 0.41
Espanola | 220 | -25 | -27 | 29 | 21 | 4920 | 23 | 108 | 650 | 0.8 | 840 | 160 | 2.3 | 0.4 | 0.33 | 0.42
Exeter | 265 | -17 | -19 | 30 | 23 | 3900 | 25 | 113 | 810 | 0.9 | 975 | 180 | 2.4 | 0.4 | 0.37 | 0.48
Fenelon Falls | 260 | -25 | -27 | 30 | 23 | 4440 | 25 | 108 | 730 | 0.9 | 950 | 120 | 2.3 | 0.4 | 0.28 | 0.36
Fergus | 400 | -20 | -22 | 29 | 23 | 4300 | 28 | 108 | 760 | 0.9 | 925 | 160 | 2.2 | 0.4 | 0.28 | 0.36
Forest | 215 | -16 | -18 | 31 | 23 | 3740 | 25 | 103 | 810 | 1.0 | 875 | 160 | 2.0 | 0.4 | 0.37 | 0.48
Fort Erie | 180 | -15 | -17 | 30 | 24 | 3650 | 23 | 108 | 860 | 1.0 | 1020 | 160 | 2.3 | 0.4 | 0.36 | 0.46
Fort Erie (Ridgeway) | 190 | -15 | -17 | 30 | 24 | 3600 | 25 | 108 | 860 | 1.0 | 1000 | 160 | 2.3 | 0.4 | 0.36 | 0.46
Fort Frances | 340 | -33 | -35 | 29 | 22 | 5440 | 25 | 108 | 570 | 0.7 | 725 | 120 | 2.3 | 0.3 | 0.23 | 0.31
Gananoque | 80 | -22 | -24 | 28 | 23 | 4010 | 23 | 103 | 760 | 0.9 | 900 | 180 | 2.1 | 0.4 | 0.37 | 0.47
Geraldton | 345 | -36 | -39 | 28 | 21 | 6450 | 20 | 86 | 550 | 0.8 | 725 | 100 | 2.9 | 0.4 | 0.22 | 0.3
Glencoe | 215 | -16 | -18 | 31 | 24 | 3680 | 28 | 103 | 800 | 0.9 | 925 | 180 | 1.5 | 0.4 | 0.34 | 0.43
Goderich | 185 | -16 | -18 | 29 | 23 | 4000 | 25 | 92 | 810 | 1.0 | 950 | 180 | 2.4 | 0.4 | 0.37 | 0.48
Gore Bay | 205 | -24 | -26 | 28 | 22 | 4700 | 23 | 92 | 640 | 0.8 | 860 | 160 | 2.6 | 0.4 | 0.34 | 0.44
Graham | 495 | -35 | -37 | 29 | 22 | 5940 | 23 | 97 | 570 | 0.8 | 750 | 140 | 2.6 | 0.3 | 0.22 | 0.3
Gravenhurst (Muskoka Airport) | 255 | -26 | -28 | 29 | 23 | 4760 | 25 | 103 | 790 | 0.9 | 1050 | 120 | 2.7 | 0.4 | 0.28 | 0.36
Grimsby | 85 | -16 | -18 | 30 | 23 | 3520 | 23 | 108 | 760 | 0.9 | 875 | 160 | 0.9 | 0.4 | 0.36 | 0.46
Guelph | 340 | -19 | -21 | 29 | 23 | 4270 | 28 | 103 | 770 | 0.9 | 875 | 140 | 1.9 | 0.4 | 0.28 | 0.36
Guthrie | 280 | -24 | -26 | 29 | 23 | 4300 | 28 | 103 | 700 | 0.8 | 950 | 120 | 2.5 | 0.4 | 0.28 | 0.36
Haileybury | 210 | -32 | -35 | 30 | 22 | 5600 | 23 | 92 | 590 | 0.8 | 820 | 120 | 2.4 | 0.4 | 0.34 | 0.44
Haldimand (Caledonia) | 190 | -18 | -20 | 30 | 23 | 3750 | 23 | 108 | 810 | 0.9 | 875 | 160 | 1.2 | 0.4 | 0.34 | 0.44
Haldimand (Hagersville) | 215 | -17 | -19 | 30 | 23 | 3760 | 25 | 97 | 840 | 1.0 | 875 | 160 | 1.3 | 0.4 | 0.36 | 0.46
Haliburton | 335 | -27 | -29 | 29 | 23 | 4840 | 25 | 92 | 780 | 0.9 | 980 | 100 | 2.9 | 0.4 | 0.27 | 0.35
Halton Hills (Georgetown) | 255 | -19 | -21 | 30 | 23 | 4200 | 28 | 119 | 750 | 0.8 | 850 | 140 | 1.4 | 0.4 | 0.29 | 0.37
Hamilton — Above Escarpment - West of John C. Munro Int'l Airport | 240 | -17 | -19 | 31 | 23 | 3460 | 23 | 108 | 810 | 0.9 | 875 | 160 | 1.5 | 0.4 | 0.36 | 0.46
Hamilton — Above Escarpment - East of John C. Munro Int'l Airport | 200 | -17 | -19 | 31 | 23 | 3460 | 23 | 108 | 810 | 0.9 | 875 | 160 | 1.3 | 0.4 | 0.36 | 0.46
Hamilton — Below Escarpment - West of Highway 403 | 90 | -17 | -19 | 31 | 23 | 3460 | 23 | 108 | 810 | 0.9 | 875 | 160 | 1.1 | 0.4 | 0.36 | 0.46
Hamilton — Below Escarpment - East of Highway 403 | 90 | -17 | -19 | 31 | 23 | 3460 | 23 | 108 | 810 | 0.9 | 875 | 160 | 1.1 | 0.4 | 0.36 | 0.46
Hanover | 270 | -19 | -21 | 29 | 22 | 4300 | 28 | 103 | 790 | 0.9 | 1050 | 140 | 2.6 | 0.4 | 0.34 | 0.44
Hastings | 200 | -24 | -26 | 30 | 23 | 4280 | 25 | 92 | 730 | 0.9 | 840 | 140 | 2.0 | 0.4 | 0.32 | 0.41
Hawkesbury | 50 | -25 | -27 | 30 | 23 | 4610 | 23 | 103 | 800 | 0.9 | 925 | 160 | 2.3 | 0.4 | 0.32 | 0.41
Hearst | 245 | -35 | -37 | 29 | 21 | 6450 | 20 | 86 | 520 | 0.7 | 825 | 80 | 2.8 | 0.3 | 0.23 | 0.3
Honey Harbour | 180 | -24 | -26 | 29 | 23 | 4300 | 25 | 97 | 710 | 0.9 | 1050 | 160 | 2.7 | 0.4 | 0.3 | 0.39
Hornepayne | 360 | -37 | -40 | 28 | 21 | 6340 | 20 | 93 | 420 | 0.7 | 750 | 80 | 3.3 | 0.4 | 0.22 | 0.3
Huntsville | 335 | -26 | -29 | 29 | 22 | 4850 | 25 | 103 | 800 | 0.9 | 1000 | 120 | 2.9 | 0.4 | 0.27 | 0.35
Ingersoll | 280 | -18 | -20 | 30 | 23 | 3920 | 28 | 108 | 840 | 1.0 | 950 | 180 | 1.7 | 0.4 | 0.37 | 0.48
Iroquois Falls | 275 | -33 | -36 | 29 | 21 | 6100 | 20 | 86 | 575 | 0.8 | 825 | 100 | 2.9 | 0.3 | 0.29 | 0.37
Jellicoe | 330 | -36 | -39 | 28 | 21 | 6400 | 20 | 86 | 550 | 0.8 | 750 | 100 | 2.7 | 0.4 | 0.22 | 0.3
Kapuskasing | 245 | -34 | -36 | 29 | 21 | 6250 | 20 | 86 | 550 | 0.8 | 825 | 100 | 3.0 | 0.3 | 0.24 | 0.31
Kemptville | 90 | -25 | -27 | 30 | 23 | 4540 | 25 | 92 | 750 | 0.9 | 925 | 160 | 2.3 | 0.4 | 0.32 | 0.41
Kenora | 370 | -33 | -35 | 28 | 22 | 5630 | 25 | 113 | 515 | 0.6 | 630 | 120 | 2.5 | 0.3 | 0.23 | 0.31
Killaloe | 185 | -28 | -31 | 30 | 22 | 4960 | 23 | 86 | 680 | 0.8 | 825 | 120 | 2.7 | 0.4 | 0.27 | 0.35
Kincardine | 190 | -17 | -19 | 28 | 22 | 3890 | 25 | 92 | 800 | 1.0 | 950 | 180 | 2.6 | 0.4 | 0.37 | 0.48
Kingston | 80 | -22 | -24 | 28 | 23 | 4000 | 23 | 108 | 780 | 1.0 | 950 | 180 | 2.1 | 0.4 | 0.37 | 0.47
Kinmount | 295 | -26 | -28 | 29 | 23 | 4600 | 25 | 108 | 750 | 0.9 | 950 | 120 | 2.7 | 0.4 | 0.27 | 0.35
Kirkland Lake | 325 | -33 | -36 | 29 | 22 | 6000 | 23 | 92 | 600 | 0.8 | 875 | 100 | 2.9 | 0.3 | 0.3 | 0.39
Kitchener | 335 | -19 | -21 | 29 | 23 | 4200 | 28 | 119 | 780 | 0.9 | 925 | 140 | 2.0 | 0.4 | 0.29 | 0.37
Lakefield | 240 | -24 | -26 | 30 | 23 | 4330 | 25 | 92 | 720 | 0.9 | 850 | 140 | 2.2 | 0.4 | 0.3 | 0.38
Lansdowne House | 240 | -38 | -40 | 28 | 21 | 7150 | 23 | 92 | 500 | 0.8 | 680 | 140 | 3.0 | 0.2 | 0.24 | 0.32
Leamington | 190 | -15 | -17 | 31 | 24 | 3400 | 28 | 113 | 800 | 0.9 | 875 | 180 | 0.8 | 0.4 | 0.37 | 0.47
Lindsay | 265 | -24 | -26 | 30 | 23 | 4320 | 25 | 103 | 720 | 0.8 | 850 | 140 | 2.3 | 0.4 | 0.3 | 0.38
Lion's Head | 185 | -19 | -21 | 27 | 22 | 4300 | 25 | 103 | 700 | 0.9 | 950 | 180 | 2.7 | 0.4 | 0.37 | 0.48
Listowel | 380 | -19 | -21 | 29 | 23 | 4300 | 28 | 119 | 800 | 0.9 | 1000 | 160 | 2.6 | 0.4 | 0.34 | 0.43
London | 245 | -18 | -20 | 30 | 24 | 3900 | 28 | 103 | 825 | 0.9 | 975 | 180 | 1.9 | 0.4 | 0.37 | 0.47
Lucan | 300 | -17 | -19 | 30 | 23 | 3900 | 25 | 113 | 810 | 0.9 | 1000 | 180 | 2.3 | 0.4 | 0.37 | 0.48
Maitland | 85 | -23 | -25 | 29 | 23 | 4080 | 25 | 103 | 770 | 0.9 | 975 | 180 | 2.2 | 0.4 | 0.34 | 0.44
Markdale | 425 | -20 | -22 | 29 | 22 | 4500 | 28 | 103 | 820 | 0.9 | 1050 | 160 | 3.2 | 0.4 | 0.32 | 0.41
Markham | 175 | -21 | -23 | 31 | 24 | 4000 | 25 | 86 | 720 | 0.8 | 825 | 140 | 1.3 | 0.4 | 0.34 | 0.44
Martin | 485 | -35 | -37 | 29 | 22 | 5900 | 25 | 103 | 560 | 0.8 | 750 | 120 | 2.6 | 0.3 | 0.22 | 0.3
Matheson | 265 | -33 | -36 | 29 | 21 | 6080 | 20 | 86 | 580 | 0.8 | 825 | 100 | 2.8 | 0.3 | 0.3 | 0.39
Mattawa | 165 | -29 | -31 | 30 | 22 | 5050 | 23 | 86 | 700 | 0.9 | 875 | 100 | 2.1 | 0.4 | 0.25 | 0.32
Midland | 190 | -24 | -26 | 29 | 23 | 4200 | 25 | 97 | 740 | 0.9 | 1060 | 160 | 2.7 | 0.4 | 0.3 | 0.39
Milton | 200 | -18 | -20 | 30 | 23 | 3920 | 25 | 125 | 750 | 0.9 | 850 | 160 | 1.3 | 0.4 | 0.34 | 0.43
Milverton | 370 | -19 | -21 | 29 | 23 | 4200 | 28 | 108 | 800 | 0.9 | 1050 | 160 | 2.4 | 0.4 | 0.34 | 0.43
Minden | 270 | -27 | -29 | 29 | 23 | 4640 | 25 | 97 | 780 | 0.9 | 1010 | 100 | 2.7 | 0.4 | 0.27 | 0.35
Mississauga | 160 | -18 | -20 | 30 | 23 | 3880 | 25 | 113 | 720 | 0.9 | 800 | 160 | 1.1 | 0.4 | 0.34 | 0.44
Mississauga (Lester B. Pearson International Airport) | 170 | -20 | -22 | 31 | 24 | 3890 | 26 | 108 | 685 | 0.8 | 790 | 160 | 1.1 | 0.4 | 0.34 | 0.44
Mississauga (Port Credit) | 75 | -18 | -20 | 29 | 23 | 3780 | 25 | 108 | 720 | 0.9 | 800 | 160 | 0.9 | 0.4 | 0.37 | 0.48
Mitchell | 335 | -18 | -20 | 29 | 23 | 4100 | 28 | 113 | 810 | 0.9 | 1050 | 160 | 2.4 | 0.4 | 0.35 | 0.45
Moosonee | 10 | -36 | -38 | 28 | 22 | 6800 | 18 | 81 | 500 | 0.8 | 700 | 160 | 2.7 | 0.3 | 0.26 | 0.35
Morrisburg | 75 | -23 | -25 | 30 | 23 | 4370 | 25 | 103 | 800 | 0.9 | 950 | 180 | 2.3 | 0.4 | 0.32 | 0.41
Mount Forest | 420 | -21 | -24 | 28 | 22 | 4700 | 28 | 103 | 740 | 0.9 | 940 | 140 | 2.7 | 0.4 | 0.32 | 0.41
Nakina | 325 | -36 | -38 | 28 | 21 | 6500 | 20 | 86 | 540 | 0.8 | 750 | 100 | 2.8 | 0.4 | 0.22 | 0.3
Nanticoke (Jarvis) | 205 | -17 | -18 | 30 | 23 | 3700 | 28 | 108 | 840 | 1.0 | 900 | 160 | 1.4 | 0.4 | 0.37 | 0.48
Nanticoke (Port Dover) | 180 | -15 | -17 | 30 | 24 | 3600 | 25 | 108 | 860 | 1.0 | 950 | 140 | 1.2 | 0.4 | 0.37 | 0.48
Napanee | 90 | -22 | -24 | 29 | 23 | 4140 | 23 | 92 | 770 | 0.9 | 900 | 160 | 1.9 | 0.4 | 0.34 | 0.43
Newcastle | 115 | -20 | -22 | 30 | 23 | 3990 | 23 | 86 | 760 | 0.9 | 830 | 160 | 1.5 | 0.4 | 0.37 | 0.48
Newcastle (Bowmanville) | 95 | -20 | -22 | 30 | 23 | 4000 | 23 | 86 | 760 | 0.9 | 830 | 160 | 1.4 | 0.4 | 0.37 | 0.48
New Liskeard | 180 | -32 | -35 | 30 | 22 | 5570 | 23 | 92 | 570 | 0.8 | 810 | 100 | 2.6 | 0.4 | 0.34 | 0.43
Newmarket | 185 | -22 | -24 | 30 | 23 | 4260 | 28 | 108 | 700 | 0.8 | 800 | 140 | 2.0 | 0.4 | 0.3 | 0.38
Niagara Falls | 210 | -16 | -18 | 30 | 23 | 3600 | 23 | 96 | 810 | 0.9 | 950 | 160 | 1.8 | 0.4 | 0.34 | 0.43
North Bay | 210 | -28 | -30 | 28 | 22 | 5150 | 25 | 95 | 775 | 0.9 | 975 | 120 | 2.2 | 0.4 | 0.27 | 0.34
Norwood | 225 | -24 | -26 | 30 | 23 | 4320 | 25 | 92 | 720 | 0.8 | 850 | 120 | 2.1 | 0.4 | 0.32 | 0.41
Oakville | 90 | -18 | -20 | 30 | 23 | 3760 | 23 | 97 | 750 | 0.9 | 850 | 160 | 1.1 | 0.4 | 0.37 | 0.47
Orangeville | 430 | -21 | -23 | 29 | 23 | 4450 | 28 | 108 | 730 | 0.8 | 875 | 140 | 2.3 | 0.4 | 0.28 | 0.36
Orillia | 230 | -25 | -27 | 29 | 23 | 4260 | 25 | 103 | 740 | 0.9 | 1000 | 120 | 2.4 | 0.4 | 0.28 | 0.36
Oshawa | 110 | -19 | -21 | 30 | 23 | 3860 | 23 | 86 | 760 | 0.9 | 875 | 160 | 1.4 | 0.4 | 0.37 | 0.48
Ottawa (Barrhaven) | 98 | -25 | -27 | 30 | 23 | 4500 | 25 | 92 | 750 | 0.8 | 900 | 160 | 2.4 | 0.4 | 0.32 | 0.41
Ottawa (City Hall) | 70 | -25 | -27 | 30 | 23 | 4440 | 23 | 86 | 750 | 0.8 | 900 | 160 | 2.4 | 0.4 | 0.32 | 0.41
Ottawa (Kanata) | 98 | -25 | -27 | 30 | 23 | 4520 | 25 | 92 | 730 | 0.8 | 900 | 160 | 2.5 | 0.4 | 0.32 | 0.41
Ottawa (MacDonald-Cartier Int'l Airport) | 125 | -25 | -27 | 30 | 23 | 4500 | 24 | 89 | 750 | 0.8 | 900 | 160 | 2.4 | 0.4 | 0.32 | 0.41
Ottawa (Orleans) | 70 | -26 | -28 | 30 | 23 | 4500 | 23 | 91 | 750 | 0.8 | 900 | 160 | 2.4 | 0.4 | 0.32 | 0.41
Owen Sound | 215 | -19 | -21 | 29 | 22 | 4030 | 28 | 113 | 760 | 0.9 | 1075 | 160 | 2.8 | 0.4 | 0.34 | 0.44
Pagwa River | 185 | -35 | -37 | 28 | 21 | 6500 | 20 | 86 | 540 | 0.8 | 825 | 80 | 2.7 | 0.4 | 0.22 | 0.3
Paris | 245 | -18 | -20 | 30 | 23 | 4000 | 23 | 96 | 790 | 0.9 | 925 | 160 | 1.4 | 0.4 | 0.33 | 0.42
Parkhill | 205 | -16 | -18 | 31 | 23 | 3800 | 25 | 103 | 800 | 0.9 | 925 | 180 | 2.1 | 0.4 | 0.37 | 0.48
Parry Sound | 215 | -24 | -26 | 28 | 22 | 4640 | 23 | 97 | 820 | 1.0 | 1050 | 160 | 2.8 | 0.4 | 0.3 | 0.39
Pelham (Fonthill) | 230 | -15 | -17 | 30 | 23 | 3690 | 23 | 96 | 820 | 0.9 | 950 | 160 | 2.1 | 0.4 | 0.33 | 0.42
Pembroke | 125 | -28 | -31 | 30 | 23 | 4980 | 23 | 105 | 640 | 0.8 | 825 | 100 | 2.5 | 0.4 | 0.27 | 0.35
Penetanguishene | 220 | -24 | -26 | 29 | 23 | 4200 | 25 | 97 | 720 | 0.9 | 1050 | 160 | 2.8 | 0.4 | 0.3 | 0.39
Perth | 130 | -25 | -27 | 30 | 23 | 4540 | 25 | 92 | 730 | 0.8 | 900 | 140 | 2.3 | 0.4 | 0.32 | 0.41
Petawawa | 135 | -29 | -31 | 30 | 23 | 4980 | 23 | 92 | 640 | 0.8 | 825 | 100 | 2.6 | 0.4 | 0.27 | 0.35
Peterborough | 200 | -23 | -25 | 30 | 23 | 4400 | 25 | 92 | 710 | 0.8 | 840 | 140 | 2.0 | 0.4 | 0.32 | 0.41
Petrolia | 195 | -16 | -18 | 31 | 24 | 3640 | 25 | 108 | 810 | 0.9 | 920 | 180 | 1.3 | 0.4 | 0.37 | 0.47
Pickering Zone 1 | 85 | -19 | -21 | 30 | 23 | 3800 | 23 | 92 | 730 | 0.9 | 825 | 140 | 1.0 | 0.4 | 0.37 | 0.48
Pickering Zone 2 | 175 | -20 | -22 | 30 | 23 | 3900 | 23 | 92 | 730 | 0.9 | 825 | 140 | 1.5 | 0.4 | 0.37 | 0.48
Pickering Zone 3 | 255 | -21 | -23 | 30 | 23 | 4010 | 23 | 86 | 770 | 0.91 | 850 | 140 | 1.9 | 0.4 | 0.35 | 0.45
Pickering Zone 4 | 315 | -22 | -24 | 30 | 23 | 4200 | 23 | 86 | 770 | 0.91 | 850 | 140 | 2.3 | 0.4 | 0.35 | 0.45
Picton | 95 | -21 | -23 | 29 | 23 | 3980 | 23 | 92 | 770 | 0.9 | 940 | 160 | 2.0 | 0.4 | 0.38 | 0.49
Plattsville | 300 | -19 | -21 | 29 | 23 | 4150 | 28 | 103 | 820 | 0.9 | 950 | 140 | 1.9 | 0.4 | 0.33 | 0.42
Point Alexander | 150 | -29 | -32 | 30 | 22 | 4960 | 23 | 92 | 650 | 0.8 | 850 | 100 | 2.5 | 0.4 | 0.27 | 0.35
Port Burwell | 195 | -15 | -17 | 30 | 24 | 3800 | 25 | 92 | 930 | 1.1 | 1000 | 180 | 1.2 | 0.4 | 0.37 | 0.47
Port Colborne | 180 | -15 | -17 | 30 | 24 | 3600 | 23 | 108 | 850 | 1.0 | 1000 | 160 | 2.1 | 0.4 | 0.36 | 0.46
Port Elgin | 205 | -17 | -19 | 28 | 22 | 4100 | 25 | 92 | 790 | 0.9 | 850 | 180 | 2.8 | 0.4 | 0.37 | 0.48
Port Hope | 100 | -21 | -23 | 29 | 23 | 3970 | 23 | 94 | 760 | 0.9 | 825 | 180 | 1.2 | 0.4 | 0.37 | 0.48
Port Perry | 270 | -22 | -24 | 30 | 23 | 4260 | 25 | 97 | 720 | 0.8 | 850 | 140 | 2.4 | 0.4 | 0.34 | 0.44
Port Stanley | 180 | -15 | -17 | 31 | 24 | 3850 | 25 | 92 | 940 | 1.1 | 975 | 180 | 1.2 | 0.4 | 0.37 | 0.47
Prescott | 90 | -23 | -25 | 29 | 23 | 4120 | 25 | 103 | 770 | 0.9 | 975 | 180 | 2.2 | 0.4 | 0.34 | 0.44
Princeton | 280 | -18 | -20 | 30 | 23 | 4000 | 25 | 97 | 810 | 0.9 | 925 | 160 | 1.5 | 0.4 | 0.33 | 0.42
Raith | 475 | -34 | -37 | 28 | 22 | 5900 | 23 | 97 | 570 | 0.8 | 750 | 120 | 2.7 | 0.4 | 0.22 | 0.3
Rayside-Balfour (Chelmsford) | 270 | -28 | -30 | 29 | 21 | 5200 | 25 | 92 | 650 | 0.8 | 850 | 180 | 2.5 | 0.4 | 0.35 | 0.45
Red Lake | 360 | -35 | -37 | 28 | 21 | 6220 | 20 | 92 | 470 | 0.7 | 630 | 120 | 2.6 | 0.3 | 0.22 | 0.3
Renfrew | 115 | -27 | -30 | 30 | 23 | 4900 | 23 | 97 | 620 | 0.8 | 810 | 140 | 2.5 | 0.4 | 0.27 | 0.35
Richmond Hill | 230 | -21 | -23 | 31 | 24 | 4000 | 25 | 97 | 740 | 0.8 | 850 | 140 | 1.5 | 0.4 | 0.34 | 0.44
Rockland | 50 | -26 | -28 | 30 | 23 | 4600 | 23 | 92 | 780 | 0.9 | 950 | 160 | 2.4 | 0.4 | 0.31 | 0.4
Sarnia | 190 | -16 | -18 | 31 | 24 | 3750 | 25 | 100 | 750 | 0.9 | 825 | 180 | 1.1 | 0.4 | 0.37 | 0.47
Sault Ste. Marie | 190 | -25 | -28 | 29 | 22 | 4960 | 23 | 97 | 660 | 0.9 | 950 | 200 | 3.1 | 0.4 | 0.33 | 0.44
Schreiber | 310 | -34 | -36 | 27 | 21 | 5960 | 20 | 103 | 600 | 0.8 | 850 | 160 | 3.3 | 0.4 | 0.29 | 0.39
Seaforth | 310 | -17 | -19 | 30 | 23 | 4100 | 25 | 108 | 810 | 0.9 | 1025 | 160 | 2.5 | 0.4 | 0.35 | 0.45
Shelburne | 495 | -22 | -24 | 29 | 23 | 4700 | 28 | 108 | 740 | 0.9 | 900 | 150 | 3.1 | 0.4 | 0.31 | 0.4
Simcoe | 210 | -17 | -19 | 30 | 24 | 3700 | 28 | 113 | 860 | 1.0 | 950 | 160 | 1.3 | 0.4 | 0.35 | 0.45
Sioux Lookout | 375 | -34 | -36 | 28 | 22 | 5950 | 25 | 97 | 520 | 0.7 | 710 | 100 | 2.6 | 0.3 | 0.22 | 0.3
Smiths Falls | 130 | -25 | -27 | 30 | 23 | 4540 | 25 | 92 | 730 | 0.8 | 850 | 140 | 2.3 | 0.4 | 0.32 | 0.41
Smithville | 185 | -16 | -18 | 30 | 23 | 3650 | 23 | 108 | 800 | 0.9 | 900 | 160 | 1.5 | 0.4 | 0.33 | 0.42
Smooth Rock Falls | 235 | -34 | -36 | 29 | 21 | 6250 | 20 | 92 | 560 | 0.8 | 850 | 80 | 2.7 | 0.3 | 0.25 | 0.32
Southampton | 180 | -17 | -19 | 28 | 22 | 4100 | 25 | 92 | 800 | 1.0 | 830 | 180 | 2.7 | 0.4 | 0.37 | 0.48
South River | 355 | -27 | -29 | 29 | 22 | 5090 | 25 | 103 | 830 | 1.0 | 975 | 120 | 2.8 | 0.4 | 0.27 | 0.35
St. Catharines | 105 | -16 | -18 | 30 | 23 | 3540 | 23 | 92 | 770 | 0.9 | 850 | 160 | 1.0 | 0.4 | 0.36 | 0.46
St. Mary's | 310 | -18 | -20 | 30 | 23 | 4000 | 28 | 108 | 820 | 1.0 | 1025 | 160 | 2.2 | 0.4 | 0.37 | 0.47
St. Thomas | 225 | -16 | -18 | 31 | 24 | 3780 | 25 | 103 | 900 | 1.0 | 975 | 180 | 1.4 | 0.4 | 0.37 | 0.47
Stirling | 120 | -23 | -25 | 30 | 23 | 4220 | 25 | 97 | 740 | 0.9 | 850 | 120 | 1.7 | 0.4 | 0.31 | 0.4
Stratford | 360 | -18 | -20 | 29 | 23 | 4050 | 28 | 113 | 820 | 1.0 | 1050 | 160 | 2.3 | 0.4 | 0.35 | 0.45
Strathroy | 225 | -17 | -19 | 31 | 24 | 3780 | 25 | 103 | 770 | 0.9 | 950 | 180 | 1.9 | 0.4 | 0.37 | 0.47
Sturgeon Falls | 205 | -28 | -30 | 29 | 21 | 5200 | 25 | 95 | 700 | 0.9 | 910 | 140 | 2.4 | 0.4 | 0.27 | 0.35
Sudbury | 275 | -28 | -30 | 29 | 21 | 5180 | 25 | 97 | 650 | 0.8 | 875 | 200 | 2.5 | 0.4 | 0.36 | 0.46
Sundridge | 340 | -27 | -29 | 29 | 22 | 5080 | 25 | 97 | 840 | 1.0 | 975 | 120 | 2.8 | 0.4 | 0.27 | 0.35
Tavistock | 340 | -19 | -21 | 29 | 23 | 4100 | 28 | 113 | 820 | 1.0 | 1010 | 160 | 2.1 | 0.4 | 0.35 | 0.45
Temagami | 300 | -30 | -33 | 30 | 22 | 5420 | 23 | 92 | 650 | 0.8 | 875 | 120 | 2.6 | 0.4 | 0.29 | 0.37
Thamesford | 280 | -19 | -21 | 30 | 23 | 3950 | 28 | 108 | 820 | 0.9 | 975 | 160 | 1.9 | 0.4 | 0.37 | 0.48
Thedford | 205 | -16 | -18 | 31 | 23 | 3710 | 25 | 103 | 810 | 1.0 | 900 | 180 | 2.1 | 0.4 | 0.37 | 0.48
Thunder Bay | 210 | -31 | -33 | 29 | 21 | 5650 | 23 | 108 | 560 | 0.8 | 710 | 160 | 2.9 | 0.4 | 0.29 | 0.39
Tillsonburg | 215 | -17 | -19 | 30 | 24 | 3840 | 25 | 103 | 880 | 1.0 | 980 | 160 | 1.3 | 0.4 | 0.34 | 0.44
Timmins | 300 | -34 | -36 | 29 | 21 | 5940 | 20 | 108 | 560 | 0.8 | 875 | 100 | 3.1 | 0.3 | 0.27 | 0.35
Timmins (Porcupine) | 295 | -34 | -36 | 29 | 21 | 6000 | 20 | 103 | 560 | 0.8 | 875 | 100 | 2.9 | 0.3 | 0.29 | 0.37
Toronto Metropolitan Region — Etobicoke | 160 | -20 | -22 | 31 | 24 | 3800 | 26 | 108 | 720 | 0.8 | 800 | 160 | 1.1 | 0.4 | 0.34 | 0.44
Toronto Metropolitan Region — North York | 175 | -20 | -22 | 31 | 24 | 3760 | 25 | 108 | 730 | 0.8 | 850 | 150 | 1.2 | 0.4 | 0.34 | 0.44
Toronto Metropolitan Region — Scarborough | 180 | -20 | -22 | 31 | 24 | 3800 | 25 | 92 | 730 | 0.9 | 825 | 160 | 1.2 | 0.4 | 0.37 | 0.47
Toronto Metropolitan Region — Toronto (City Hall) | 90 | -18 | -20 | 31 | 23 | 3520 | 25 | 97 | 720 | 0.9 | 820 | 160 | 0.9 | 0.4 | 0.34 | 0.44
Trenton | 80 | -22 | -24 | 29 | 23 | 4110 | 23 | 97 | 760 | 0.9 | 850 | 160 | 1.6 | 0.4 | 0.37 | 0.47
Trout Creek | 330 | -27 | -29 | 29 | 22 | 5100 | 25 | 103 | 780 | 0.9 | 975 | 120 | 2.7 | 0.4 | 0.27 | 0.35
Uxbridge | 275 | -22 | -24 | 30 | 23 | 4240 | 25 | 103 | 700 | 0.8 | 850 | 140 | 2.4 | 0.4 | 0.33 | 0.42
Vaughan (Woodbridge) | 165 | -20 | -22 | 31 | 24 | 4100 | 26 | 113 | 700 | 0.8 | 800 | 140 | 1.1 | 0.4 | 0.34 | 0.44
Vittoria | 215 | -15 | -17 | 30 | 24 | 3680 | 25 | 113 | 880 | 1.0 | 950 | 160 | 1.3 | 0.4 | 0.37 | 0.47
Walkerton | 275 | -18 | -20 | 30 | 22 | 4300 | 28 | 103 | 790 | 0.9 | 1025 | 160 | 2.7 | 0.4 | 0.36 | 0.46
Wallaceburg | 180 | -16 | -18 | 31 | 24 | 3600 | 28 | 97 | 760 | 0.9 | 825 | 180 | 0.9 | 0.4 | 0.35 | 0.45
Waterloo | 330 | -19 | -21 | 29 | 23 | 4200 | 28 | 119 | 780 | 0.9 | 925 | 160 | 2.0 | 0.4 | 0.29 | 0.37
Watford | 240 | -17 | -19 | 31 | 24 | 3740 | 25 | 108 | 790 | 0.9 | 950 | 160 | 1.9 | 0.4 | 0.37 | 0.47
Wawa | 290 | -34 | -36 | 26 | 21 | 5840 | 20 | 93 | 725 | 0.9 | 950 | 160 | 3.4 | 0.4 | 0.3 | 0.39
Welland | 180 | -15 | -17 | 30 | 23 | 3670 | 23 | 103 | 840 | 1.0 | 975 | 160 | 2.0 | 0.4 | 0.34 | 0.43
West Lorne | 215 | -16 | -18 | 31 | 24 | 3700 | 28 | 103 | 840 | 1.0 | 900 | 180 | 1.3 | 0.4 | 0.37 | 0.47
Whitby | 85 | -20 | -22 | 30 | 23 | 3820 | 23 | 86 | 760 | 0.9 | 850 | 160 | 1.2 | 0.4 | 0.37 | 0.48
Whitby (Brooklin) | 160 | -20 | -22 | 30 | 23 | 4010 | 23 | 86 | 770 | 0.9 | 850 | 140 | 1.9 | 0.4 | 0.35 | 0.45
White River | 375 | -39 | -42 | 28 | 21 | 6150 | 20 | 92 | 575 | 0.8 | 825 | 100 | 3.6 | 0.4 | 0.22 | 0.3
Wiarton | 185 | -19 | -21 | 29 | 22 | 4300 | 25 | 103 | 740 | 0.9 | 1000 | 180 | 2.7 | 0.4 | 0.34 | 0.44
Windsor | 185 | -16 | -18 | 32 | 24 | 3400 | 28 | 103 | 800 | 0.9 | 900 | 180 | 0.8 | 0.4 | 0.37 | 0.47
Wingham | 310 | -18 | -20 | 30 | 23 | 4220 | 28 | 108 | 780 | 0.9 | 1050 | 160 | 2.6 | 0.4 | 0.36 | 0.46
Woodstock | 300 | -19 | -21 | 30 | 23 | 3910 | 28 | 113 | 830 | 0.9 | 930 | 160 | 1.9 | 0.4 | 0.34 | 0.44
Wyoming | 215 | -16 | -18 | 31 | 24 | 3700 | 25 | 103 | 815 | 0.9 | 900 | 180 | 1.6 | 0.4 | 0.37 | 0.47
OBC SB-12 3.1.1.1. Energy Efficiency
Open OBC SB-12 3.1.1.1. in the code viewer(1)Except as provided in Articles 3.1.1.4. to 3.1.1.11., the building shall conform to
(a)Article 3.1.1.2. if the building is located in Zone 1 with less than 5000 heating degree days, or
(b)Article 3.1.1.3. if the building is located in Zone 2 with 5000 or more heating degree days.
(2)Except as required in Sentence (5), all walls, ceilings, floors, windows and doors that separate heated space from unheated space, the exterior air or the exterior soil shall have thermal resistance ratings conforming to this Subsection.
(3)Where specified in compliance packages in Tables 3.1.1.2.A to 3.1.1.2.C and Tables 3.1.1.3.A to 3.1.1.3.C, space heating equipment, domestic water heating equipment and heat or energy recovery ventilators shall be provided and have the efficiency rating conforming to this Subsection. (See Appendix A.)
(4)Except as required in Sentence (5), insulation shall be provided between heated and unheated spaces and between heated spaces and the exterior in accordance with this Chapter.
(5)A building envelope assembly that separates a conditioned space from an adjoining storage garage shall be treated as an assembly separating heated space from exterior, even if the storage garage is intended to be heated.
(6)Reflective surfaces of insulating materials shall not be considered in calculating the thermal resistance of building assemblies.
(7)Except as provided in Sentences (8) and 3.1.1.11.(3), where the ratio of the gross area of windows, sidelights, skylights, glazing in doors and sliding glass doors to the gross area of peripheral walls measured from grade to the top of the upper most ceiling is not more than 17%, the building shall comply with a compliance package selected from Tables 3.1.1.2.A to 3.1.1.2.C and Tables 3.1.1.3.A to 3.1.1.3.C, and Table 3.1.1.11. (See Appendix A.)
(8)Except as permitted in Sentences 3.1.1.11.(3), where the ratio of the gross area of windows, sidelights, skylights, glazing in doors and sliding glass doors to the gross area of peripheral walls measured from grade to the top of the upper most ceiling is more than 17% but not more than 22%, the building shall comply with a compliance package selected from Tables 3.1.1.2.A to 3.1.1.2.C, Tables 3.1.1.3.A to 3.1.1.3.C and Table 3.1.1.11. and the overall coefficient of heat transfer of the fenestration shall be upgraded to
(a)1.6 where 1.8 is required by the selected compliance package or permitted by Article 3.1.1.4.,
(b)1.4 where 1.6 is required by the selected compliance package or permitted by Article 3.1.1.4.,
(c)1.2 where 1.4 is required by the selected compliance package or permitted by Article 3.1.1.4., and
(d)1.0 where 1.2 is required by the selected compliance package or permitted by Article 3.1.1.4.
(See Appendix A.)
(9)Where the ratio of gross area of windows, sidelights, skylights, glazing in doors and sliding glass doors to the gross area of peripheral walls measured from grade to the top of the upper most ceiling is more than 22%, the building shall comply with Subsection 3.1.2. (See Appendix A.)
(10)Where a dwelling unit has a walkout basement, the thermal performance level of the exterior basement wall shall be not less than that required for the above grade wall for
(a)the basement wall containing the door opening, and
(b)any basement wall that has an exposed wall area above the ground level exceeding 50% of that basement wall area.
(11)For a conditioned space, the exterior building envelope or envelope that separates conditioned space from unconditioned space shall conform to the applicable values specified in Articles 3.1.1.2. and 3.1.1.3.
(12)Where an enclosed unheated space is separated from a heated space by glazing, the unheated enclosure may be considered to provide a thermal resistance of RSI 0.16.
(13)Where a compliance package in Tables 3.1.1.2.A to 3.1.1.2.C, Tables 3.1.1.3.A to 3.1.1.3.C, or Table 3.1.1.11. specifies a nominal RSI value, effective RSI value and U-Value for a component specified in Column 1 of the Table and the component conforms to one of the thermal values, the component need not conform to the other thermal values specified for the component.
(14)Insulation in the rim joist or header area where the floor assembly and wall assembly intersect shall have a thermal value not less than the thermal value of the insulation in the walls above grade.
(15)Where a compliance package in Tables 3.1.1.2.A to 3.1.1.2.C, Tables 3.1.1.3.A to 3.1.1.3.C, or Table 3.1.1.11. specifies an overall coefficient of heat transfer and an energy rating value for a fenestration component specified in Column 1 of the Table and the component conforms to one of the thermal values, the component need not conform to the other thermal value specified for the component.
(16)Ventilation systems serving dwelling units shall have a heat or energy recovery ventilator. (See Appendix A)
(17)Except as provided in Sentence (18), a building is permitted to be designed in conformance with any of the compliance packages available for the climate zone that the building is located in, if the primary space heating of the building is supplied by
(a)a wood burning appliance,
(b)an earth energy system, or
(c)an air or water source heat pump that does not use electric resistance as a back-up heat source.
(18)For the purpose of Sentence (17), the requirements in the compliance packages for space heating equipment do not apply.
(19)Heat or energy recovery ventilators specified in compliance packages in Tables 3.1.1.2.A to 3.1.1.2.C and Tables 3.1.1.3.A to 3.1.1.3.C, shall meet
(a)the requirements of Article 9.32.3.12. of Division B of the Building Code, and
(b)the minimum SRE required in this Chapter based on a test temperature of 0°C at an air flow rate equal to the principle exhaust flow but need not exceed 30 L/s.
(20)Building envelope components that enclose a common space and are exposed to exterior or unconditioned space shall conform to this Subsection.
(21)Heating, ventilating, air-conditioning and lighting systems serving common spaces need not comply with this Subsection but shall comply with the other parts of the Building Code.
(22)Drain water heat recovery units shall be installed in accordance with Article 3.1.1.12.
OBC SB-12 3.1.1.2. Energy Efficiency for Buildings Located in Zone 1
Open OBC SB-12 3.1.1.2. in the code viewer(1)Except as provided in Sentences (2) to (5) and (7), the minimum thermal performance of building envelope assemblies and equipment shall conform to Table 3.1.1.2.A.
(2)Except for solid fuel-burning space heating equipment and except as provided in Sentence (5), where the space heating equipment efficiency is 84% or more but less than 92%, the minimum thermal performance of the building envelope assemblies and equipment shall conform to Table 3.1.1.2.B.
(3)Where electric space heating is used, the minimum thermal performance of the building envelope assemblies and equipment shall conform to Table 3.1.1.2.C.
(4)Except as permitted in Sentence (5), where the space heating equipment efficiency cannot meet the requirements of the applicable compliance packages, energy efficiency compliance shall be achieved in accordance with Subsection 3.1.2. of this Supplementary Standard.
(5)Where an ICF wall assembly is installed as an above and below grade wall assembly that has minimum RSI 1.76 (R10) insulation on the interior surface of the concrete and minimum RSI 1.76 (R10) insulation on the exterior surface, the ICF wall is deemed to comply with the thermal values set out for walls in the compliance packages in Table 3.1.1.2.A. (See Appendix A.)
(6)An ICF wall assembly described in Sentence (5) is permitted to be used in lieu of basement walls that require insulation value of RSI 3.52 ci (R20) or less. (See Appendix A.)
(7)Building designs that utilize combined space heating and domestic water heating systems are permitted to use compliance package A4, provided that
(a)the water heating equipment has a minimum of 0.80 EF, 90% AFUE, or is a condensing type, or
(b)the combination of equipment has a minimum of 0.85 TPF determined in accordance with CAN/CSA-P.9, "Test Method for Determining the Performance of Combined Space and Water Heating Systems (Combos)".
OBC SB-12 3.1.1.3. Energy Efficiency for Buildings Located in Zone 2
Open OBC SB-12 3.1.1.3. in the code viewer(1)Except as provided in Sentences (2) to (5) and (7), the minimum thermal performance of building envelope assemblies and equipment shall conform to Table 3.1.1.3.A.
(2)Except for solid fuel-burning space heating equipment and except as provided in Sentence (5), where the space heating equipment efficiency is 84% or more but less than 92%, the minimum thermal performance of the building envelope assemblies and equipment shall conform to Table 3.1.1.3.B.
(3)Where electric space heating is used, the minimum thermal performance of the building envelope assemblies and equipment shall conform to Table 3.1.1.3.C.
(4)Except as provided in Sentence 3.1.1.1.(17), where the space heating equipment efficiency cannot meet the requirements of the applicable compliance packages, energy efficiency compliance shall be achieved in accordance with Subsection 3.1.2. of this Supplementary Standard.
(5)Where an ICF wall assembly is installed as an above and below grade wall assembly that has minimum RSI 1.76 (R10) insulation on the interior surface of the concrete and minimum RSI 1.76 (R10) insulation on the exterior surface, the ICF wall is deemed to comply with the thermal values set out for walls in the compliance packages in Table 3.1.1.3.A. (See Appendix A.)
(6)An ICF wall assembly described in Sentence (5) is permitted to be used in lieu of basement walls that require insulation value of RSI 3.52 ci (R20) or less. (See Appendix A.)
(7)Building designs that utilize combined space heating and domestic water heating systems are permitted to use compliance package A4 or A5, provided that
(a)the water heating equipment has a minimum of 0.80 EF, 90% AFUE, or is a condensing type, or
(b)the combination of equipment has a minimum of 0.85 TPF determined in accordance with CAN/CSA-P.9, "Test Method for Determining the Performance of Combined Space and Water Heating Systems (Combos)".
OBC SB-12 A-3.1.1. Compliance Packages.
Open OBC SB-12 in the code viewerIndividual components of compliance packages found in Tables 3.1.1.2.A to 3.1.1.2.C and Tables 3.1.1.3.A to 3.1.1.3.C are not permitted to be mixed with similar components of other compliance packages either found within the same Table or similar components of compliance packages found in other Tables.
OBC SB-12 A-3.1.1.1.(7), (8) and (9) Fenestration to Wall Ratio.
Open OBC SB-12 in the code viewerWhen the fenestration to wall ratio is calculated, all fenestration areas and the entire peripheral wall above grade is included. The peripheral wall area includes floor rim board areas and all above grade wall areas. It is essentially the sum of the above grade walls that separate conditioned spaces from unconditioned spaces, and adjacent units. In the case of an attached garage, the walls that are common with the house and the garage are also included in the wall area calculations. For attached homes, the above grade portions of the walls that are common to other conditioned units are also included in the wall area. The fenestration area is based on the rough structural opening provided for windows, skylights, sliding glass doors, and for glazed portions in doors. For A–frame structures with steeply inclined roofs that also act as walls, the roof portion that serves as the interior wall area can be considered as the wall area in calculating the fenestration to wall ratio.
Where the window performance needs to be upgraded in accordance with Sentence 3.1.1.1.(8), upgrading can be done based on ER values in conjunction with Table 3.1.1.9.
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OBC SB-12 Effective RSI Value and U-Value Calculations
Open OBC SB-12 in the code viewerEffective RSI values and U values are to be calculated in accordance with good practice. Some sample effective R value calculations are provided below. Overall thermal transmittance (U values) can be calculated by taking the inverse of the effective R value (U=1/(effective RSI value))
Information on the calculation of effective thermal resistance of opaque assemblies can also be found at the following NRCan website http://www.nrcan.gc.ca/energy/efficiency/housing/new-homes/energy-star/14176. The combined values for the stud and cavity insulation components used below are taken from the same website. Further details can be found under "Tables for Calculating Effective Thermal Resistance of Opaque Assemblies".
OBC SB-12 3.1.1.4. Airtightness
Open OBC SB-12 3.1.1.4. in the code viewer(1)Where a dwelling unit is designed and constructed to be sufficiently airtight such that the air leakage of the whole dwelling unit is less than or equal to one of the applicable airtightness targets specified in the same row of Table 3.1.1.4.A, the requirements of Tables 3.1.1.2.A to 3.1.1.2.C, Tables 3.1.1.3.A to 3.1.1.3.C, and Table 3.1.1.11. are permitted to be substituted in accordance with Table 3.1.1.4.B or Table 3.1.1.4.C.
(2)Airtightness targets described in Sentence (1) shall be measured under as operated conditions in accordance with CAN/CGSB 149.10 "Determination of the Airtightness of Building Envelopes by the Fan Depressurization Method" or NRCan, "EnerGuide Rating System Technical Procedures Version 15.1".
(3)For purposes of substitutions described in Sentence (1),
(a)a maximum of one substitution per dwelling unit may be made if substitutions are made in accordance with Table 3.1.1.4.B, or
(b)a maximum of two substitutions per dwelling unit may be made if substitutions are made in accordance with Table 3.1.1.4.C.
OBC SB-12 3.1.1.5. Elements Acting as a Thermal Bridge
Open OBC SB-12 3.1.1.5. in the code viewer(1)Except for a foundation wall, the insulated portion of a wall that incorporates wood stud framing elements that have a thermal resistance of less than RSI 0.90 shall be insulated to restrict heat flow through the studs by a material providing a thermal resistance at least equal to 25% of the thermal resistance required for the insulated portion of the assembly in Articles 3.1.1.2., 3.1.1.3. and 3.1.1.11.
(2)Except as provided in Sentence (3), the thermal resistance of the insulated portion of a building assembly in Articles 3.1.1.2. and 3.1.1.3. that incorporates metal framing elements, such as steel studs and steel joists, that act as thermal bridges to facilitate heat flow through the assembly, shall be 20% greater than the values shown in Tables 3.1.1.2.A to 3.1.1.2.C and Tables 3.1.1.3.A to 3.1.1.3.C and Table 3.1.1.11., unless it can be shown that the heat flow is not greater than the heat flow through a wood frame assembly of the same thickness.
(3)Sentence (2) does not apply to building assemblies incorporating thermal bridges where the thermal bridges are insulated to restrict heat flow through the thermal bridges by a material providing a thermal resistance at least equal to 25% of the thermal resistance required for the insulated portion of the assembly in Articles 3.1.1.2., 3.1.1.3. and 3.1.1.11.
OBC SB-12 Table 3.1.1.2.A. (SI) — Zone 1 — Compliance Packages for Space Heating Equipment with AFUE ≥ 92%
Open OBC SB-12 Table 3.1.1.2.A. in the code viewerTable 3.1.1.2.A. (SI) — Zone 1 — Compliance Packages for Space Heating Equipment with AFUE ≥ 92% Forming Part of Sentence 3.1.1.2.(1) Component | Thermal Values[8] | Compliance Package A1 | Compliance Package A2 | Compliance Package A3 | Compliance Package A4 | Compliance Package A5 | Compliance Package A6 Ceiling with Attic Space | Minimum Nominal RSI[1] | 10.56 | 10.56 | 8.80 | 10.56 | 8.80 | 10.56 Ceiling with Attic Space | Maximum U[2] | 0.096 | 0.096 | 0.115 | 0.096 | 0.115 | 0.096 Ceiling with Attic Space | Minimum Effective RSI[2] | 10.43 | 10.43 | 8.67 | 10.43 | 8.67 | 10.43 Ceiling Without Attic Space | Minimum Nominal RSI[1] | 5.46 | 5.46 | 5.46 | 5.46 | 5.46 | 5.46 Ceiling Without Attic Space | Maximum U[2] | 0.205 | 0.205 | 0.205 | 0.205 | 0.205 | 0.205 Ceiling Without Attic Space | Minimum Effective RSI[2] | 4.87 | 4.87 | 4.87 | 4.87 | 4.87 | 4.87 Exposed Floor | Minimum Nominal RSI[1] | 5.46 | 5.46 | 6.16 | 5.46 | 6.16 | 5.46 Exposed Floor | Maximum U[3] | 0.190 | 0.190 | 0.177 | 0.190 | 0.177 | 0.190 Exposed Floor | Minimum Effective RSI[3] | 5.25 | 5.25 | 5.64 | 5.25 | 5.64 | 5.25 Walls Above Grade | Minimum Nominal RSI[1] | 3.87 | 3.34 + 0.88 ci | 2.46 + 1.32 ci | 3.87 + 0.88 ci | 3.34 + 0.88 ci | 3.87 + 0.88 ci Walls Above Grade | Maximum U[3] | 0.333 | 0.280 | 0.305 | 0.265 | 0.280 | 0.265 Walls Above Grade | Minimum Effective RSI[3] | 3.00 | 3.58 | 3.28 | 3.77 | 3.58 | 3.77 Basement Walls[6] | Minimum Nominal RSI[1] | 3.52 ci | 2.11 + 1.76 ci | 3.52 ci | 3.52 ci | 2.11 + 0.88 ci | 3.52 ci Basement Walls[6] | Maximum U[4] | 0.269 | 0.272 | 0.269 | 0.269 | 0.355 | 0.269 Basement Walls[6] | Minimum Effective RSI[4] | 3.72 | 3.67 | 3.72 | 3.72 | 2.81 | 3.72 Below Grade Slab Entire Surface > 600 mm Below Grade | Minimum Nominal RSI[1] | N/A | N/A | N/A | N/A | N/A | N/A Below Grade Slab Entire Surface > 600 mm Below Grade | Maximum U[4] | N/A | N/A | N/A | N/A | N/A | N/A Below Grade Slab Entire Surface > 600 mm Below Grade | Minimum Effective RSI[4] | N/A | N/A | N/A | N/A | N/A | N/A Heated Slab or Slab ≤ 600 mm Below Grade | Minimum Nominal RSI[1] | 1.76 | 1.76 | 1.76 | 1.76 | 1.76 | 1.76 Heated Slab or Slab ≤ 600 mm Below Grade | Maximum U[4] | 0.510 | 0.510 | 0.510 | 0.510 | 0.510 | 0.510 Heated Slab or Slab ≤ 600 mm Below Grade | Minimum Effective RSI[4] | 1.96 | 1.96 | 1.96 | 1.96 | 1.96 | 1.96 Edge of Below Grade Slab ≤ 600 mm Below Grade | Minimum Nominal RSI[1] | 1.76 | 1.76 | 1.76 | 1.76 | 1.76 | 1.76 Windows and Sliding Glass Doors | Maximum U[5] | 1.6 | 1.6 | 1.4 | 1.6 | 1.6 | 1.6 Windows and Sliding Glass Doors | Energy Rating | 25 | 25 | 29 | 25 | 25 | 25 Skylights | Maximum U[5] | 2.8 | 2.8 | 2.8 | 2.8 | 2.8 | 2.8 Space Heating Equipment | Minimum AFUE | 96% | 96% | 94% | 96% | 94% | 92% HRV | Minimum SRE | 75% | 75% | 81% | 75% | 70% | 65% Domestic Water Heater[7] | Minimum EF | 0.80 | 0.70 | 0.67 | 0.67 | 0.80 | 0.80 Column 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 Notes to Table 3.1.1.2.A (SI): (1) The values listed are minimum Nominal RSI-Values for the thermal insulation component only. (2) U-Value and effective RSI value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation. (3) U-Value and effective RSI value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film. (4) U-Value and effective RSI value shall include entire basement wall or slab assembly components and interior air film. (5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in W/(m²•K). (6) In the case of basement wall assemblies, where RSI 3.52 ci is required RSI 2.11 + 1.76 ci is permitted to be used or vice versa; or where RSI 2.11 + 0.88 ci is required, RSI 2.64 ci is permitted to be used or vice versa. (7) If an EF of a water tank is not indicated in a compliance package, there is no EF requirement for water tank for that specific compliance package. (8) Nominal and effective RSI values are expressed in (m²•K)/W. U-Values are expressed in W/(m²•K). Forming Part of Sentence 3.1.1.2.(1) Table 3.1.1.2.A. (IP) — Zone 1 — Compliance Packages for Space Heating Equipment with AFUE ≥ 92% Component | Thermal Values[8] | Compliance Package A1 | Compliance Package A2 | Compliance Package A3 | Compliance Package A4 | Compliance Package A5 | Compliance Package A6 Ceiling with Attic Space | Minimum Nominal R[1] | 60 | 60 | 50 | 60 | 50 | 60 Ceiling with Attic Space | Maximum U[2] | 0.017 | 0.017 | 0.020 | 0.017 | 0.020 | 0.017 Ceiling with Attic Space | Minimum Effective R[2] | 59.22 | 59.22 | 49.23 | 59.22 | 49.23 | 59.22 Ceiling Without Attic Space | Minimum Nominal R[1] | 31 | 31 | 31 | 31 | 31 | 31 Ceiling Without Attic Space | Maximum U[2] | 0.036 | 0.036 | 0.036 | 0.036 | 0.036 | 0.036 Ceiling Without Attic Space | Minimum Effective R[2] | 27.65 | 27.65 | 27.65 | 27.65 | 27.65 | 27.65 Exposed Floor | Minimum Nominal R[1] | 31 | 31 | 35 | 31 | 35 | 31 Exposed Floor | Maximum U[3] | 0.034 | 0.034 | 0.031 | 0.034 | 0.031 | 0.034 Exposed Floor | Minimum Effective R[3] | 29.80 | 29.80 | 32.02 | 29.80 | 32.02 | 29.80 Walls Above Grade | Minimum Nominal R[1] | 22 | 19 + 5 ci | 14 + 7.5 ci | 22 + 5 ci | 19 + 5 ci | 22 + 5 ci Walls Above Grade | Maximum U[3] | 0.059 | 0.049 | 0.054 | 0.047 | 0.049 | 0.047 Walls Above Grade | Minimum Effective R[3] | 17.03 | 20.32 | 18.62 | 21.40 | 20.32 | 21.40 Basement Walls[6] | Minimum Nominal R[1] | 20 ci | 12 + 10 ci | 20 ci | 20 ci | 12 + 5 ci | 20 ci Basement Walls[6] | Maximum U[4] | 0.047 | 0.048 | 0.047 | 0.047 | 0.063 | 0.047 Basement Walls[6] | Minimum Effective R[4] | 21.12 | 20.84 | 21.12 | 21.12 | 15.96 | 21.12 Below Grade Slab Entire Surface > 600 mm Below Grade | Minimum Nominal R[1] | N/A | N/A | N/A | N/A | N/A | N/A Below Grade Slab Entire Surface > 600 mm Below Grade | Maximum U[4] | N/A | N/A | N/A | N/A | N/A | N/A Below Grade Slab Entire Surface > 600 mm Below Grade | Minimum Effective R[4] | N/A | N/A | N/A | N/A | N/A | N/A Heated Slab or Slab ≤ 600 mm Below Grade | Minimum Nominal R[1] | 10 | 10 | 10 | 10 | 10 | 10 Heated Slab or Slab ≤ 600 mm Below Grade | Maximum U[4] | 0.090 | 0.090 | 0.090 | 0.090 | 0.090 | 0.090 Heated Slab or Slab ≤ 600 mm Below Grade | Minimum Effective R[4] | 11.13 | 11.13 | 11.13 | 11.13 | 11.13 | 11.13 Edge of Below Grade Slab ≤ 600 mm Below Grade | Minimum Nominal R[1] | 10 | 10 | 10 | 10 | 10 | 10 Windows and Sliding Glass Doors | Maximum U[5] | 0.28 | 0.28 | 0.25 | 0.28 | 0.28 | 0.28 Windows and Sliding Glass Doors | Energy Rating | 25 | 25 | 29 | 25 | 25 | 25 Skylights | Maximum U[5] | 0.49 | 0.49 | 0.49 | 0.49 | 0.49 | 0.49 Space Heating Equipment | Minimum AFUE | 96% | 96% | 94% | 96% | 94% | 92% HRV | Minimum SRE | 75% | 75% | 81% | 75% | 70% | 65% Domestic Water Heater[7] | Minimum EF | 0.80 | 0.70 | 0.67 | 0.67 | 0.80 | 0.80 Column 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 Notes to Table 3.1.1.2.A (IP): (1) The values listed are minimum Nominal R-Values for the thermal insulation component only. (2) U-Value and effective R value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation. (3) U-Value and effective R value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film. (4) U-Value and effective R value shall include entire basement wall or slab assembly components and interior air film. (5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in Btu/(h•ft²•F). (6) In the case of basement wall assemblies, where R20 ci is required R12 + 10 ci is permitted to be used or vice versa; or where R12 + 5 ci is required, R15 ci is permitted to be used or vice versa. (7) If an EF of a water tank is not indicated in a compliance package, there is no EF requirement for water tank for that specific compliance package. (8) Nominal and effective R values are expressed in (h•ft²•F)/Btu. U-Values are expressed in Btu/(h•ft²•F).
OBC SB-12 Table 3.1.1.3.B. (SI) — Zone 2 — Compliance Packages for Space Heating Equipment with 84% ≤ AFUE < 92%
Open OBC SB-12 Table 3.1.1.3.B. in the code viewerTable 3.1.1.3.B. (SI) — Zone 2 — Compliance Packages for Space Heating Equipment with 84% ≤ AFUE < 92% Forming Part of Sentence 3.1.1.3.(2) Component | Thermal Values[8] | Compliance Package B1 | Compliance Package B2 | Compliance Package B3 | Compliance Package B4 | Compliance Package B5 | Compliance Package B6 Ceiling with Attic Space | Minimum Nominal RSI[1] | 8.80 | 10.56 | 10.56 + HH | 10.56 + HH | 8.80 | 10.56 Ceiling with Attic Space | Maximum U[2] | 0.115 | 0.096 | 0.095 | 0.095 | 0.115 | 0.096 Ceiling with Attic Space | Minimum Effective RSI[2] | 8.67 | 10.43 | 10.55 | 10.55 | 8.67 | 10.43 Ceiling Without Attic Space | Minimum Nominal RSI[1] | 5.46 | 5.46 | 5.46 | 5.46 | 5.46 | 5.46 Ceiling Without Attic Space | Maximum U[2] | 0.205 | 0.205 | 0.205 | 0.205 | 0.205 | 0.205 Ceiling Without Attic Space | Minimum Effective RSI[2] | 4.87 | 4.87 | 4.87 | 4.87 | 4.87 | 4.87 Exposed Floor | Minimum Nominal RSI[1] | 6.16 | 5.46 | 5.46 + 1.76 ci | 5.46 | 6.16 | 5.46 Exposed Floor | Maximum U[3] | 0.177 | 0.190 | 0.143 | 0.190 | 0.177 | 0.190 Exposed Floor | Minimum Effective RSI[3] | 5.64 | 5.25 | 7.01 | 5.25 | 5.64 | 5.25 Walls Above Grade | Minimum Nominal RSI[1] | 3.87 + 1.32 ci | 3.87 + 1.32 ci | 3.87 + 1.76 ci | 3.87 + 1.76 ci | 3.87 + 1.76 ci | 3.87 + 1.76 ci Walls Above Grade | Maximum U[3] | 0.238 | 0.238 | 0.215 | 0.215 | 0.215 | 0.215 Walls Above Grade | Minimum Effective RSI[3] | 4.21 | 4.21 | 4.65 | 4.65 | 4.65 | 4.65 Basement Walls[6] | Minimum Nominal RSI[1] | 3.52 ci | 2.11 + 1.76 ci | 3.52 + 1.76 ci | 3.52 + 1.76 ci | 3.52 + 2.11 ci | 3.52 + 2.11 ci Basement Walls[6] | Maximum U[4] | 0.269 | 0.272 | 0.226 | 0.226 | 0.213 | 0.213 Basement Walls[6] | Minimum Effective RSI[4] | 3.72 | 3.67 | 4.43 | 4.43 | 4.7 | 4.7 Below Grade Slab Entire Surface > 600 mm Below Grade | Minimum Nominal RSI[1] | N/A | 0.88 | 1.76 | 1.76 | 0.88 | 0.88 Below Grade Slab Entire Surface > 600 mm Below Grade | Maximum U[4] | N/A | 0.926 | 0.510 | 0.510 | 0.926 | 0.926 Below Grade Slab Entire Surface > 600 mm Below Grade | Minimum Effective RSI[4] | N/A | 1.08 | 1.96 | 1.96 | 1.08 | 1.08 Heated Slab or Slab ≤ 600 mm Below Grade | Minimum Nominal RSI[1] | 1.76 | 1.76 | 1.76 | 1.76 | 1.76 | 1.76 Heated Slab or Slab ≤ 600 mm Below Grade | Maximum U[4] | 0.510 | 0.510 | 0.510 | 0.510 | 0.510 | 0.510 Heated Slab or Slab ≤ 600 mm Below Grade | Minimum Effective RSI[4] | 1.96 | 1.96 | 1.96 | 1.96 | 1.96 | 1.96 Edge of Below Grade Slab ≤ 600 mm Below Grade | Minimum Nominal RSI[1] | 1.76 | 1.76 | 1.76 | 1.76 | 1.76 | 1.76 Windows and Sliding Glass Doors | Maximum U[5] | 1.2 | 1.6 | 1.4 | 1.4 | 1.4 | 1.2 Windows and Sliding Glass Doors | Energy Rating | 34 | 25 | 29 | 29 | 29 | 34 Skylights | Maximum U[5] | 2.8 | 2.8 | 2.8 | 2.8 | 2.8 | 2.8 Space Heating Equipment | Minimum AFUE | 90% | 90% | 87% | 87% | 84% | 84% HRV | Minimum SRE | 75% | 81% | 70% | 75% | 81% | 81% Domestic Water Heater[7] | Minimum EF | 0.66 | 0.66 | 0.66 | 0.62 | 0.66 | N/A Column 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 Notes to Table 3.1.1.3.B (SI): The following definition applies: HH = 250 mm high heel (1) The values listed are minimum Nominal RSI-values for the thermal insulation component only. (2) U-Value and effective RSI value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation. (3) U-Value and effective RSI value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film. (4) U-Value and effective RSI value shall include entire basement wall or slab assembly components and interior air film. (5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in W/(m²•K). (6) In the case of basement wall assemblies, where RSI 3.52 ci is required RSI 2.11 + 1.76 ci is permitted to be used or vice versa; or where RSI 2.11 + 0.88 ci is required, RSI 2.64 ci is permitted to be used or vice versa. (7) If an EF of a water tank is not indicated in a compliance package, there is no EF requirement for water tank for that specific compliance package. (8) Nominal and effective RSI values are expressed in (m²•K)/W. U-Values are expressed in W/(m²•K). Forming Part of Sentence 3.1.1.3.(2) Table 3.1.1.3.B. (IP) — Zone 2 — Compliance Packages for Space Heating Equipment with 84% ≤ AFUE < 92% Component | Thermal Values[8] | Compliance Package B1 | Compliance Package B2 | Compliance Package B3 | Compliance Package B4 | Compliance Package B5 | Compliance Package B6 Ceiling with Attic Space | Minimum Nominal R[1] | 50 | 60 | 60 + HH | 60 + HH | 50 | 60 Ceiling with Attic Space | Maximum U[2] | 0.020 | 0.017 | 0.016 | 0.016 | 0.020 | 0.017 Ceiling with Attic Space | Minimum Effective R[2] | 49.23 | 59.22 | 59.90 | 59.90 | 49.23 | 59.22 Ceiling Without Attic Space | Minimum Nominal R[1] | 31 | 31 | 31 | 31 | 31 | 31 Ceiling Without Attic Space | Maximum U[2] | 0.036 | 0.036 | 0.036 | 0.036 | 0.036 | 0.036 Ceiling Without Attic Space | Minimum Effective R[2] | 27.65 | 27.65 | 27.65 | 27.65 | 27.65 | 27.65 Exposed Floor | Minimum Nominal R[1] | 35 | 31 | 31 + 10 ci | 31 | 35 | 31 Exposed Floor | Maximum U[3] | 0.031 | 0.034 | 0.025 | 0.034 | 0.031 | 0.034 Exposed Floor | Minimum Effective R[3] | 32.02 | 29.80 | 39.80 | 29.80 | 32.02 | 29.80 Walls Above Grade | Minimum Nominal R[1] | 22 + 7.5 ci | 22 + 7.5 ci | 22 + 10 ci | 22 + 10 ci | 22 + 10 ci | 22 + 10 ci Walls Above Grade | Maximum U[3] | 0.042 | 0.042 | 0.038 | 0.038 | 0.038 | 0.038 Walls Above Grade | Minimum Effective R[3] | 23.90 | 23.90 | 26.40 | 26.40 | 26.40 | 26.40 Basement Walls[6] | Minimum Nominal R[1] | 20 ci | 12 + 10 ci | 20 + 10 ci | 20 + 10 ci | 20 + 12 ci | 20 + 12 ci Basement Walls[6] | Maximum U[4] | 0.047 | 0.048 | 0.040 | 0.040 | 0.037 | 0.037 Basement Walls[6] | Minimum Effective R[4] | 21.12 | 20.84 | 25.15 | 25.15 | 26.69 | 26.69 Below Grade Slab Entire Surface > 600 mm Below Grade | Minimum Nominal R[1] | N/A | 5 | 10 | 10 | 5 | 5 Below Grade Slab Entire Surface > 600 mm Below Grade | Maximum U[4] | N/A | 0.163 | 0.090 | 0.090 | 0.163 | 0.163 Below Grade Slab Entire Surface > 600 mm Below Grade | Minimum Effective R[4] | N/A | 6.13 | 11.13 | 11.13 | 6.13 | 6.13 Heated Slab or Slab ≤ 600 mm Below Grade | Minimum Nominal R[1] | 10 | 10 | 10 | 10 | 10 | 10 Heated Slab or Slab ≤ 600 mm Below Grade | Maximum U[4] | 0.090 | 0.090 | 0.090 | 0.090 | 0.090 | 0.090 Heated Slab or Slab ≤ 600 mm Below Grade | Minimum Effective R[4] | 11.13 | 11.13 | 11.13 | 11.13 | 11.13 | 11.13 Edge of Below Grade Slab ≤ 600 mm Below Grade | Minimum Nominal R[1] | 10 | 10 | 10 | 10 | 10 | 10 Windows and Sliding Glass Doors | Maximum U[5] | 0.21 | 0.28 | 0.25 | 0.25 | 0.25 | 0.21 Windows and Sliding Glass Doors | Energy Rating | 34 | 25 | 29 | 29 | 29 | 34 Skylights | Maximum U[5] | 0.49 | 0.49 | 0.49 | 0.49 | 0.49 | 0.49 Space Heating Equipment | Minimum AFUE | 90% | 90% | 87% | 87% | 84% | 84% HRV | Minimum SRE | 75% | 81% | 70% | 75% | 81% | 81% Domestic Water Heater[7] | Minimum EF | 0.66 | 0.66 | 0.66 | 0.62 | 0.66 | N/A Column 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 Notes to Table 3.1.1.3.B (IP): The following definition applies: HH = 10 inch high heel (1) The values listed are minimum Nominal R values for the thermal insulation component only. (2) U-Value and effective R value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation. (3) U-Value and effective R value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film. (4) U-Value and effective R value shall include entire basement wall or slab assembly components and interior air film. (5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in Btu/(h•ft²•F). (6) In the case of basement wall assemblies, where R20 ci is required R12 + 10 ci is permitted to be used or vice versa; or where R12 + 5 ci is required, R15 ci is permitted to be used or vice versa. (7) If an EF of a water tank is not indicated in a compliance package, there is no EF requirement for water tank for that specific compliance package. (8) Nominal and effective R values are expressed in (h•ft²•F)/Btu. U-Values are expressed in Btu/(h•ft²•F).
OBC SB-12 Table 3.1.1.4.A. Airtightness Targets
Open OBC SB-12 Table 3.1.1.4.A. in the code viewerTable 3.1.1.4.A. — Airtightness Targets Forming Part of Sentence 3.1.1.4.(1) and Subsection 3.1.2. Building Type | ACH @ 50 Pa | NLA @ 10 Pa, cm²/m² | NLA @ 10 Pa, in²/100 ft² | NLR @ 50 Pa, L/s/m² | NLR @ 50 Pa, cfm/ft² Detached | 2.5 | 1.26 | 1.81 | 0.93 | 0.18 Attached | 3.0 | 2.12 | 3.06 | 1.32 | 0.26 Column 1 | 2 | 3 | 4 | 5 | 6
OBC SB-12 Table 3.1.1.4.C. (SI) — Permitted Substitutions for Airtight Dwelling Units(3) Maximum Two Substitutions per Dwelling Unit [2]
Open OBC SB-12 Table 3.1.1.4.C. in the code viewerTable 3.1.1.4.C. (SI) — Permitted Substitutions for Airtight Dwelling Units(3) Maximum Two Substitutions per Dwelling Unit [2] Forming Part of Sentences 3.1.1.4.(1) and (3) Required Compliance | Permitted Substitutions — Airtightness Complies with Table 3.1.1.4.A.[1] Above grade continuous wall insulation RSI 1.32 ci or RSI 1.76 ci | Above grade continuous wall insulation RSI 0.88 ci or RSI 1.32 ci, respectively RSI 3.87 or RSI 4.22 insulation between studs in above grade walls with continuous insulation | RSI 3.34 or RSI 3.87 insulation, respectively, between studs in above grade walls with continuous insulation Basement wall RSI 3.52 + 2.11 ci, RSI 3.52 + 1.76 ci or RSI 3.52 ci | Basement wall RSI 2.64 ci or RSI 2.11 + 0.88 ci Slab located more than 600 mm below grade and entire under-slab insulation is RSI 1.76 or RSI 0.88 | RSI 0, if slab is unheated; RSI 0.88, if slab is heated RSI 10.56 ceiling insulation with or without 250 mm high heel | RSI 8.80 ceiling insulation Column 1 | 2 Notes to Table 3.1.1.4.C (SI): (1) Where nominal RSI values are given, the use of corresponding U-Value or effective RSI values are permitted. (2) Where the required airtightness is achieved, simultaneous substitution of two components listed in this Table is permitted. (3) Use only Table 3.1.1.4.B or Table 3.1.1.4.C, not both. Forming Part of Sentences 3.1.1.4.(1) and (3) Table 3.1.1.4.C. (IP) — Permitted Substitutions for Airtight Dwelling Units(3) Maximum Two Substitutions per Dwelling Unit [2] Required Compliance | Permitted Substitutions — Airtightness Complies with Table 3.1.1.4.A.[1] Above grade continuous wall insulation R7.5 ci or R10 ci | Above grade continuous wall insulation R5 ci or R7.5 ci, respectively R22 or R24 insulation between studs in above grade walls with continuous insulation | R19 or R22 insulation, respectively, between studs in above grade walls with continuous insulation Basement wall R20 + 12 ci, R20 + 10 ci or R20 ci | Basement wall R15 ci or R12 + 5 ci Slab located more than 24 inches below grade and entire under-slab insulation is R10 or R5 | R0, if the slab is unheated; R5, if the slab is heated R60 ceiling insulation with or without 10 inch high heel | R50 ceiling insulation Column 1 | 2 Notes to Table 3.1.1.4.C (IP): (1) Where nominal R values are given, the use of corresponding "U" or "effective R" values are permitted. (2) Where the required airtightness is achieved, simultaneous substitution of two components listed in this Table is permitted. (3) Use only Table 3.1.1.4.B or Table 3.1.1.4.C, not both.